StorageWorks(TM) Solutions ------------------------------------------------------------ BA353-Ax Desktop Expansion Unit User 's Guide Order Number: EK-BA353-UG. C01 Part I of this manual describes the BA353-Ax StorageWorks desktop expansion unit product line features, configurations, operations, and installation. Part II describes the procedures to be performed by trained personnel to exchange 5¼-inch, half-height devices, and 3½-inch StorageWorks building blocks (SBBs). Digital Equipment Corporation Maynard, Massachusetts ------------------------------------------------------------ April 1994 While Digital believes the information included in this publication is correct as of the date of publication, it is subject to change without notice. Digital Equipment Corporation makes no representations that the interconnection of its products in the manner described in this document will not infringe existing or future patent rights, nor do the descriptions contained in this document imply the granting of licenses to make, use, or sell equipment or software in accordance with the description. © Digital Equipment Corporation 1992, 1993, 1994. Printed in the United States of America. All rights reserved. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Any changes or modifications made to this equipment may void the user 's authority to operate this equipment. Operation of this equipment in a residential area may cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference. HSC, StorageWorks, and the DIGITAL logo are trademarks of Digital Equipment Corporation. The postpaid READER'S COMMENTS card requests the user 's critical evaluation to assist in preparing future documentation. This document was prepared using VAX DOCUMENT Version 2.1. ------------------------------------------------------------ Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Manufacturer 's Declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Part I Desktop Expansion Unit User 's Guide 1 Desktop Expansion Unit Overview 1.1 Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Configuration Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.3 Power Cord Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1.4 SCSI Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 1.5 Storage Device Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 2 Desktop Expansion Unit Operations 2.1 Enclosure Power and Cooling Status Display . . . . . . . . . . . . . . . . . . . . . . 2-1 2.2 SBB and Device Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.3 The SCSI Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.3.1 Terminating SCSI Buses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.3.2 Device Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.3.3 TZ30-VE 5¼-Inch Cartridge Tape Drive . . . . . . . . . . . . . . . . . . . . . . . 2-6 3 Desktop Expansion Unit Installation 3.1 Desktop Expansion Unit Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.2 Installing a 3½-Inch SBB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.3 Replacing a 3½-Inch SBB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 3.4 Replacing a 5¼-Inch, Half-Height Storage Device . . . . . . . . . . . . . . . . . . . 3-6 Part II Desktop Expansion Unit Service Guide 4 Exchanging Devices and SBBs A Specifications A.1 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 A.2 Environmental Stabilization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 iii Glossary Index Figures 1-1 BA353-Ax Desktop Expansion Unit . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1-2 Typical Desktop Expansion Unit Installation . . . . . . . . . . . . . . . . . . . 1-2 1-3 50-Conductor Standard Cable BN21H . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 1-4 50-Conductor Adapter Cable BN31B . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 1-5 50-Conductor Adapter Cable BN21R . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 1-6 50-Conductor Adapter Cable BC09D . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 1-7 Typical Desktop Expansion Unit Devices Installation . . . . . . . . . . . . . 1-7 2-1 Desktop Expansion Unit AC Power Components . . . . . . . . . . . . . . . . . 2-1 2-2 Desktop Expansion Unit--Status LED . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2-3 Storage SBB Activity and Device Fault LEDs . . . . . . . . . . . . . . . . . . . 2-3 2-4 Desktop Expansion Unit SCSI Bus Components . . . . . . . . . . . . . . . . . 2-5 2-5 Typical Device Address Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 3-1 Typical Workstation Installation--Rear View . . . . . . . . . . . . . . . . . . . 3-1 3-2 Typical 3½-Inch SBB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 3-3 Storage Device Security Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 4-1 Desktop Expansion Enclosure--Bottom View . . . . . . . . . . . . . . . . . . . 4-2 4-2 Desktop Expansion Enclosure--Cover Latch . . . . . . . . . . . . . . . . . . . . 4-2 4-3 Desktop Expansion Enclosure--Cover Tabs . . . . . . . . . . . . . . . . . . . . 4-3 4-4 Backplane In 5¼-Inch Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 4-5 Backplane In 3½-Inch Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 4-6 3½-Inch Side Rails Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Tables 1 StorageWorks Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . vi 1-1 Desktop Expansion Unit Configurations . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-2 Desktop Expansion Unit Included Storage Device Specifications . . . . 1-3 1-3 Country-Specific Power Cords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-4 SCSI ``A'' Cable Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2-1 Desktop Expansion Unit Device Addresses . . . . . . . . . . . . . . . . . . . . . 2-6 A-1 Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A-2 Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A-3 Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 A-4 Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 A-5 Thermal Stabilization Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . A-3 iv ------------------------------------------------------------ Preface This manual describes the BA353-Ax StorageWorks(TM) expansion unit product line features, configurations, operations, and installation. This manual also describes the procedures to be performed by trained personnel to exchange 5¼-inch, half-height devices and 3½-inch StorageWorks building blocks (SBBs). Intended Audience This manual is intended for use by personnel who are responsible for operating, maintaining, and installing the StorageWorks desktop expansion unit. Structure This manual is organized as follows: ------------------------------------------------------------ Part I Desktop Expansion Unit User's Guide ------------------------------------------------------------ Chapter 1 Describes the desktop expansion unit features, configurations, and cable requirements. Chapter 2 Describes the operation and status indicators for the desktop expansion unit. Chapter 3 Describes the installation of the desktop expansion unit and the removal and installation of storage device SBBs. ------------------------------------------------------------ Part II Desktop Expansion Unit Service Guide ------------------------------------------------------------ Chapter 4 Describes the procedures for modifying slot 3 from a 5¼-inch, half- height (HH) storage device to accept a 3½-inch SBBs. ------------------------------------------------------------ Appendix ------------------------------------------------------------ Appendix A Describes the physical, electrical, and environmental specifications, and the procedures for stabilizing storage devices. Documentation Conventions The following conventions are used in this manual: boldface type Boldface type indicates the first instance of terms being defined in text, in the glossary, or both. italic type Italic type indicates emphasis and complete manual titles. In the glossary, italic type is also used to indicate cross-references. v Related Documents Table 1 lists the StorageWorks related user documents organized by use, system, or product. Table 1 StorageWorks Related Documentation ------------------------------------------------------------ Document Title Order Number ------------------------------------------------------------ StorageWorks Primary Publications+ ------------------------------------------------------------ StorageWorks Solutions Configuration Guide EK-BA350-CG StorageWorks Solutions Shelf and SBB User 's Guide EK-BA350-UG StorageWorks Family 3½-inch Half-Height Device Installation Guide EK-MC350-IG RRD42 Disk Drive Owner 's Manual EK-RRD42-OM RRD43 CD-ROM User 's Guide EK-RRD43-IN RRD44 CD-ROM User 's Guide EK-RRD44-IN SWXTE StorageWorks 8505 8mm Cartridge Tape Subsystem User 's Guide EK-STWCT-UG TZ30 Cartridge Tape Drive Operator 's Manual EK-OTZ30-OM TZ30 Cartridge Tape Drive Reference Card EK-OTZ30-RC TZ30 Cartridge Tape Drive Technical Manual EK-OTZ30-TM TZK11 Tape Backup System User Guide EK-TZK11-UG ------------------------------------------------------------ General Reference Publications ------------------------------------------------------------ Digital Systems and Options Catalog + Small Computer System Interface, An Overview EK-SCSIS-OV Small Computer System Interface, A Developer 's Guide EK-SCSIS-DK ------------------------------------------------------------ + Available from your Digital account representative. ------------------------------------------------------------ vi ------------------------------------------------------------ Manufacturer 's Declarations The equipment described in this manual is listed by Underwriter Laboratories Inc. and bears the UL listing mark. The unit is also certified by the Canadian Standard Association and the TUEV Product Service GmbH and bears the Canadian Certification Mark and the TUEV GS mark. ------------------------------------------------------------ CAUTION ------------------------------------------------------------ This is a class A product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate measures. ------------------------------------------------------------ ------------------------------------------------------------ ACHTUNG ! ------------------------------------------------------------ Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses Gerätes Rundfunkstörungen auftreten, in welchen Fällen die Benutzer für entsprechende Gegenmaßnahmen verantwortlich sind. ------------------------------------------------------------ ------------------------------------------------------------ ATTENTION ! ------------------------------------------------------------ Ceci est un produit de Classe A. Dans un environment domestique, ce produit risque de créer des interférences radiélectriques, il appartiendra alors à l’utilisateur de prendre les mesures spécifiques appropriées. ------------------------------------------------------------ vii Für Bundesrepublik Deutschland For Federal Republic of Germany Pour la République féderale d'Allemagne Hochfrequenzgerätezulassung und Betriebsgenehmigung Bescheinigung des Herstellers/Importeurs: Hiermit wird bescheinigt, daß die Einrichtung in Übereinstimmung mit den Bestimmungen der DBP-Verfügung 523/1969, Amtsblatt 113/1969, und Grenzwertklasse "A" der VDE0871 funkentstört ist. Das Bundesamt für Zulassungen in der Telekommunikation der Deutschen Bundespost (DBP) hat diesem Gerät eine FTZ-Serienprüfnummer zugeteilt. Betriebsgenehmigung: Hochfrequenzgeräte dürfen erst in Betrieb genommen werden, nachdem hierfür von dem für den vorgesehenen Aufstellungsort zuständigen Fernmeldeamt mit Funkstörungsmeßstelle die Genehmigung erteilt ist. Als Antrag auf Erteilung einer Genehmigung dient eine Anmeldepostkarte (Anhang des Handbuches) mit Angabe der FTZ-Serienprüfnummer. Der untere Teil der Postkarte ist vom Betreiber zu vervollständigen und an das örtliche Fernmeldeamt zu schicken. Der obere Teil bleibt beim Gerät. Betreiberhinweis: Das Gerät wurde funktechnisch sorgfältig entstört und geprüft. Die Kennzeichnung mit der Zulassungsnummer bietet Ihnen die Gewähr, daß dieses Gerät keine anderen Fernmeldeanlagen einschließlich Funkanlagen stört. Sollten bei diesen Geräten ausnahmsweise trotzdem, z.B. im ungünstigsten Fall beim Zusammenschalten mit anderen EVA-Geräten, Funkstörungen auftreten, kann das im Einzelnen zusätzliche Funkentstörungsmaßnahmen durch den Benutzer erfordern. Bei Fragen hierzu wenden Sie sich bitte an die örtlich zuständige Funkstörungsmeßstelle Ihres Fernmeldeamtes. Externe Datenkabel: Sollte ein Austausch der von Digital spezifizierten Datenkabel nötig werden, muß der Betreiber für eine einwandfreie Funkentstörung sicherstellen, daß Austauschkabel im Aufbau und Abschirmqualität dem Digital Originalkabel entsprechen. Kennzeichnung: Die Geräte werden bereits in der Fertigung mit der Zulassungsnummer gekennzeichnet und mit einer Anmeldepostkarte versehen. Sollte Kennzeichnung und Anmeldepostkarte übergangsweise nicht mit ausgeliefert werden, kontaktieren Sie bitte das nächstgelegene Digital Equipment Kundendienstbüro. viii Part I ------------------------------------------------------------ Desktop Expansion Unit User 's Guide Part I introduces the BA353-Ax StorageWorks desktop expansion unit and describes how to configure, operate, and install the unit. 1 ------------------------------------------------------------ Desktop Expansion Unit Overview This chapter describes the StorageWorks BA353-Ax desktop expansion unit configurations, Small Computer System Interface (SCSI) and power cable requirements, and storage device varients. The StorageWorks BA353-Ax desktop expansion unit (shown in Figure 1-1) is a low-profile, SCSI-based unit with self-contained power and cooling. It can accommodate either two 3½-inch StorageWorks building blocks (SBBs) and one 5¼-inch, half-height storage device 1 , or three 3½-inch SBBs. Figure 1-1 BA353-Ax Desktop Expansion Unit ------------------------------------------------------------ CXO-3679A_PHðTX Figure 1-2 Typical Desktop Expansion Unit Installation DESKTOPðTX EXPANSIONðTX UNITðTX ------------------------------------------------------------ CXO-3692A-PHðTX Table 1-2 lists the specifications for the devices included as varients for use with the desktop expansion unit. For additional information concerning other storage devices, SCSI cables, and compatible systems, refer to the following manuals: · StorageWorks Solution Configuration Guide · StorageWorks Solution Shelf and SBB User 's Guide · Digital Systems and Options Catalog Table 1-2 Desktop Expansion Unit Included Storage Device Specifications ------------------------------------------------------------ Device Type Capacity Transfer Rate Maximum SCSI Transfer Rate ------------------------------------------------------------ RRD42-VE CD-ROM 600 MB 150 KB/s 5 MB RRD43-VE CD-ROM 600 MB 150/300 KB/s 5 MB RRD44-VE CD-ROM 600 MB 150/330 KB/s 5 MB SWXTE-AC cartridge tape drive 10 GB 1 MB 5 MB TZ30-VE cartridge tape drive 95 MB 62.5 KB/s 5 MB TZK11-VE cartridge tape drive 62.5 GB 300 KB/s 3 MB ------------------------------------------------------------ 1.2 Configuration Rules There are no unique configuration rules for the desktop expansion unit. Refer to the StorageWorks Solutions Configuration Guide for the general StorageWorks configuration rules. 1.3 Power Cord Requirements Power cords must be ordered separately. The internal power supply, located at the left rear corner of the desktop expansion unit, is a universal ac input supply that can operate on input power of 100-120 V ac or 220-240 V ac auto ranging, 43 to 63 Hz. Country-specific input ac power cords are listed in Table 1-3. For a complete description of the country-specific power cord requirements, refer to the StorageWorks Solutions Configuration Guide. Table 1-3 Country-Specific Power Cords ------------------------------------------------------------ Country Voltage Plug Length Order No. ------------------------------------------------------------ Australia 250 V ac AS 3112 - 1981 2.5 m (8.2 ft) BN19H-2E Central Europe 250 V ac CEE 7/7 (Schuko) 2.5 m (8.2 ft) BN19W-2E Denmark 250 V ac Afsnit 107 2.5 m (8.2 ft) BN19K-2E Europe--Central 250 V ac CEE 7/7 (Schuko) 2.5 m (8.2 ft) BN19W-2E India 250 V ac BS 546 2.5 m (8.2 ft) BN19S-2E Ireland 250 V ac BS 1363 2.5 m (8.2 ft) BN19A-2E Israel 250 V ac SI 32 2.5 m (8.2 ft) BN18L-2E Italy 250 V ac CEI 213-16/VII 2.5 m (8.2 ft) BN19M-2E Japan 125 V ac NEMA 5-15 3.0 m (9.8 ft) BN27S-03+ ------------------------------------------------------------ + This power cord is rated at 15 amps. (continued on next page) Desktop Expansion Unit Overview 1-3 Table 1-3 (Cont.) Country-Specific Power Cords ------------------------------------------------------------ Country Voltage Plug Length Order No. ------------------------------------------------------------ New Zealand 250 V ac AS 3112 - 1981 2.5 m (8.2 ft) BN19H-2E South Africa 250 V ac BS 546 2.5 m (8.2 ft) BN19S-2E Switzerland 250 V ac SEV 1011 2.5 m (8.2 ft) BN19E-2E United Kingdom 250 V ac BS 1363 2.5 m (8.2 ft) BN19A-2E United States 125 V ac NEMA 5-15 3.0 m (9.8 ft) BN27S-03 + ------------------------------------------------------------ + This power cord is rated at 15 amps. ------------------------------------------------------------ 1.4 SCSI Cable Requirements SCSI cables must be ordered separately. The desktop expansion unit has two 50-pin, high-density, female, SCSI connectors located at the rear of the enclosure. The desktop expansion unit requires a cable with a 50-pin, high-density, male connector. The host or controller SCSI connector determines the other cable connector type. To select the correct SCSI cables for a desktop system, complete the following steps: 1. Identify the host computer system. 2. Identify the host computer SCSI adapter. 3. Determine the maximum SCSI bus length based upon bus speed (that is, either fast [10 MB/s] or slow [5 MB/s]). 4. Determine the total SCSI bus length for all the desktop expansion units. 5. Determine the maximum SCSI cable length. 6. Select the SCSI cables. See Table 1-4 for the cable lengths and the order numbers. The SCSI cable connectors are shown in Figures 1-3 through 1-6. Table 1-4 SCSI ``A'' Cable Specifications ------------------------------------------------------------ Cable Description Length Cable Order No. ------------------------------------------------------------ Standard cable, 50-conductor 0.3 m (1.0 ft) BN21H-0C  Two 50-pin, high-density, male, straight connectors 0.5 m (1.6 ft) BN21H-0E 1.0 m (3.3 ft) BN21H-01 1.5 m (4.8 ft) BN21H-1E 2.0 m (6.5 ft) BN21H-02 3.0 m (9.8 ft) BN21H-03 5.0 m(16.4 ft) BN21H-05 10.0 m (32.8 ft) BN21H-10 15.0 m (49.2 ft) BN21H-15 20.0 m (65.6 ft) BN21H-20 (continued on next page) 1-4 Desktop Expansion Unit Overview Table 1-4 (Cont.) SCSI ``A'' Cable Specifications ------------------------------------------------------------ Cable Description Length Cable Order No. ------------------------------------------------------------ HSC(TM) controller to StorageWorks shelf cable, 50- conductor 2.0 m (6.5 ft) BN31B-02  One 50-pin, high-density, male, straight connector with thumb latches 3.0 m (9.8 ft) BN31B-03  One 50-pin, high-density, male, straight connector with thumb screws Adapter cable, 50-conductor 2.0 m (6.5 ft) BN21R-02  One 50-pin, high-density, male, straight connector 3.0 m (9.8 ft) BN21R-03  One 50-pin, low-density, male, right-angle connector 5.0 m (16.4 ft) BN21R-05 Adapter cable, 50-conductor 0.9 m (3.0 ft) BC09D-03  One 50-pin, high-density, male, straight connector 1.8 m (6.0 ft) BC09D-06  One 50-pin, low-density, male, straight connector 3.7 m (12.0 ft) BC09D-12 ------------------------------------------------------------ The StorageWorks Solutions Configuration Guide describes the SCSI cables and also lists the cables required to connect specific hosts and controllers to StorageWorks products. You can connect two or more desktop expansion units in series provided the following conditions are met: ------------------------------------------------------------ NOTE ------------------------------------------------------------ The internal bus is 0.9 meters (3.0 feet) long. When selecting cables or determining maximum bus operating speed, this demension must be included in your computations ------------------------------------------------------------ · The total length of a SCSI bus transferring data at 10 MB/s is a maximum of 3.0 m (9.8 ft). · The total length of a SCSI bus transferring data at 5 MB/s is a maximum of 6.0 m (19.7 ft). · There are seven or fewer devices on the bus. · No two devices on the SCSI bus have the same SCSI ID. Desktop Expansion Unit Overview 1-5 Figure 1-3 50-Conductor Standard Cable BN21H Figure 1-4 50-Conductor Adapter Cable BN31B Figure 1-5 50-Conductor Adapter Cable BN21R 1-6 Desktop Expansion Unit Overview Figure 1-6 50-Conductor Adapter Cable BC09D 1.5 Storage Device Requirements Any StorageWorks 3½-inch SBB or 5¼-inch, half-height storage device can be installed in the desktop expansion unit. The SBBs can be installed in any slot. As shown in Figure 1-7, the last slot on the right (slot 3) can accommodate either a 3½-inch SBB or a 5¼-inch, half-height storage device. Trained personnel (for example, Digital Multivendor Customer Services representatives) can convert this slot to use a different form factor device. Figure 1-7 Typical Desktop Expansion Unit Devices Installation SLOT 1ðTX SLOT 2ðTX STATUSðTx LEDðTX SLOT 3ðTX ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ CXO-3695A-PHðTX 2 ------------------------------------------------------------ Desktop Expansion Unit Operations This chapter describes the basic StorageWorks desktop expansion unit operations. · Section 2.1 describes the desktop expansion unit ac power requirements, dc power supply, and cooling. · Section 2.2 describes the desktop expansion unit status indicators. · Section 2.3 describes the desktop expansion unit's Small Computer System Interface (SCSI) bus, device addressing, and SCSI bus termination. 2.1 Enclosure Power and Cooling Status Display The internal power supply, located at the left rear corner of the desktop expansion unit, is a universal ac input supply that can operate on either 50 Hz or 60 Hz. It provides +5 V dc and +12 V dc for storage device operation. The +12 V dc also powers the internal blower that cools the desktop expansion unit with a front to rear air flow at a rate of three cubic feet per minute per slot. The ac power switch, as shown in Figure 2-1, controls the ac input to the dc power supply. The ac voltage to the ac output connector is independent of this switch. Digital recommends that the ac input power be switch controlled, preferably by the associated workstation or personal computer (PC). Figure 2-1 Desktop Expansion Unit AC Power Components AC OUTðTX AC INðTX ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ CXO-3683B-PHðTX ------------------------------------------------------------ AC POWERðTX SWITCHðTX ------------------------------------------------------------ ------------------------------------------------------------ The desktop expansion unit status light emitting diode (LED), mounted between the leftmost StorageWorks building blocks (SBBs) (slots 1 and 2) (see Figure 2-2), is on when the system blower is operating and both the +5 V dc and +12 V dc power supply outputs are present. When any of these conditions are not met, the desktop expansion unit status LED is off and power is removed from the SBBs and devices. There are no diagnostics for the desktop expansion unit; it is basically a ``Go'' or ``No Go'' unit. Neither the power supply or the fan within the desktop expansion unit are field replaceable units (FRUs). Should either of these devices fail, contact Digital Multivendor Customer Services. Figure 2-2 Desktop Expansion Unit--Status LED SLOT 1ðTX SLOT 2ðTX STATUSðTx LEDðTX SLOT 3ðTX ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ CXO-3695A-PHðTX Figure 2-3 Storage SBB Activity and Device Fault LEDs DEVICEðTx FAULTðTx (AMBER)ðTX ------------------------------------------------------------ ------------------------------------------------------------ DEVICEðTx ACTIVITYðTx (GREEN)ðTX CXO-3671A-PHðTX ------------------------------------------------------------ 2.3 The SCSI Bus The desktop expansion unit provides add-on storage for systems supporting SCSI devices. The capabilities of the system SCSI bus controller determine the following: · The SCSI bus transfer rate (either 5 MB/s or 10 MB/s) and therefore, the maximum SCSI bus length · The valid SCSI device addresses (target IDs) · The operation of SBB status LEDs · The valid SBB replacement methods--hot-swap, warm-swap, or cold-swap (See Section 3.3 for more information on these methods.) 2.3.1 Terminating SCSI Buses The desktop expansion unit uses a single-ended SCSI-2 bus. Bus termination is supplied by an internal, active terminator. There is no requirement for any other termination either on the bus or on the devices. The internal SCSI bus is 0.9 meters (3.0 feet) long. When selecting cables or determining maximum bus operating speed, this dimension must be included in your computations. All SCSI buses are terminated at both ends to provide reliable operation. The last desktop expansion unit on the bus always terminates the bus. Connecting a second desktop expansion unit to the output SCSI connector automatically disables the termination in the first unit. Connecting a third unit automatically disables the termination in the second unit. This feature ensures that there is never more than one termination on the SCSI bus. The combination of input and output SCSI bus connectors, plus individual SCSI device address switches, enables you to quickly configure the bus to meet your system needs. ------------------------------------------------------------ Note ------------------------------------------------------------ SCSI buses are terminated only at the controller and within the desktop expansion unit. The SCSI bus is always terminated by the last desktop expansion unit on the bus. External termination of the SCSI bus is not required. ------------------------------------------------------------ 2.3.2 Device Addressing You can assign a unique device address of 0 through 7 to each device on the SCSI bus. Use the three device address switches on the rear of the unit, as shown in Figure 2-4, to assign an unused SCSI device address to each storage device. ------------------------------------------------------------ Note ------------------------------------------------------------ Some system SCSI controllers have a preset SCSI device address, usually 6 or 7. A SCSI bus cannot operate when two devices have the same address. Check the SCSI controller documentation to determine the controller SCSI address. ------------------------------------------------------------ 2-4 Desktop Expansion Unit Operations Figure 2-4 Desktop Expansion Unit SCSI Bus Components DEVICEðTX ADDRESSðTX SWITCHESðTX SCSI INðTX SCSI OUTðTX ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ CXO-3928A-PHðTX ------------------------------------------------------------ Table 2-1 Desktop Expansion Unit Device Addresses ------------------------------------------------------------ Switch ------------------------------------------------------------ Address 1 2 3 ------------------------------------------------------------ 0 Off Off Off 1 On Off Off 2 Off On Off 3 On On Off 4 Off Off On 5 On Off On 6 Off On On 7 On On On ------------------------------------------------------------ 2.3.3 TZ30-VE 5¼-Inch Cartridge Tape Drive The TZ30-VE cartridge tape drive does not support remote device addressing. Only the local TZ30-VE device address switches (accessible through a hole on the right side of the unit) are used to set the device address. ------------------------------------------------------------ NOTE ------------------------------------------------------------ Refer to the TZ30 Cartridge Tape Technical Manual for a complete description of the TZ30 switches. ------------------------------------------------------------ Use the following procedure to set the device address: ------------------------------------------------------------ Note ------------------------------------------------------------ Switch 1 (the top switch) has no SCSI ID function and does not need to be set. Switches 2, 3, and 4 (the bottom three switches) set the device address. Switch 4 is the least significant bit (LSB) and switch 2 is the most significant bit (MSB). ------------------------------------------------------------ 1. Set the switch to the right (rear) to 0. 2. Set the switch to the left (front) to 1. The desktop expansion unit slot 3 (right) device address switch is not used for the TZ30-VE but may be set to the TZ30-VE address for convenience. 2-6 Desktop Expansion Unit Operations 3 ------------------------------------------------------------ Desktop Expansion Unit Installation This chapter describes the preferred desktop expansion unit installation and the procedures for installing, removing, and exchanging 5¼-inch, half-height storage devices, and 3½-inch StorageWorks building blocks (SBBs). 3.1 Desktop Expansion Unit Installation Typically, the desktop expansion unit is installed on top of the CPU with the monitor mounted on top. This configuration allows you to view all the status LEDs on the CPU and desktop expansion unit. The following procedures explain how to cable a preferred system installation as shown in Figure 3-1. Figure 3-1 Typical Workstation Installation--Rear View ------------------------------------------------------------ CXO-3694A_PHðTX 2. Connect the monitor ac power cord to the desktop expansion unit ac output connector and then to the monitor ac input connector if required. Connect the SCSI cable as follows: 1. Connect the 50-pin, high-density cable connector to the SCSI INPUT connector on the rear of the desktop expansion unit. Connect the other end of the cable to the host or controller SCSI connector. Refer to Section 1.4 for information on selecting a SCSI cable. 2. If additional desktop expansion units are connected, connect a 50-pin, high- density SCSI cable from the SCSI OUTPUT connector of the first desktop expansion to the SCSI INPUT connector on the rear of the second desktop expansion unit. Refer to Section 1.4 for information on configuring two or more desktop expansion units. Using this configuration permits you to sequentially apply power to the workstation, and then to the desktop expansion unit and monitor. 3.2 Installing a 3½-Inch SBB A 3½-inch SBB, as shown in Figure 3-2, is the same as the 3½-inch SBBs used with other StorageWorks products. The 3½-inch SBB is mounted horizontally with the status LEDs to the left. This has no effect on the operation of the storage device. ------------------------------------------------------------ Note ------------------------------------------------------------ Slots 1 and 2 are always used for 3½-inch SBBs. Slot 3 can be used for either a 5¼-inch, half-height storage device or a 3½-inch SBB. See Chapter 4 for the backplane connector positioning procedure. ------------------------------------------------------------ Security screws are provided with each desktop expansion unit. They can be installed through the bottom of the expansion unit into the storage devices in each slot, as shown in Figure 3-3. These screws are used to prevent unauthorized access and removal of devices. Although these screws would not deter a determined person from opening the desktop expansion unit, the person would need the proper tools to access the bottom of the unit. Security screws can be inserted for all three slots. 3-2 Desktop Expansion Unit Installation Figure 3-2 Typical 3½-Inch SBB ------------------------------------------------------------ ------------------------------------------------------------ Note ------------------------------------------------------------ The SBB connector is a 96-pin female connector that provides positive mating with the SBB shelf male connector. The connector design ensures that dc power is present until after the SCSI bus connection is broken and that dc power is applied before the SCSI bus connection is made. This feature protects the integrity of the SCSI data bus and avoids introducing noise on the bus that could either distort data or cause the bus to ``hang.'' The SBB connector is a simple, highly reliable mechanism that can support 200 SBB replacement cycles. (Removing and replacing an SBB constitutes one replacement cycle.) Over the projected StorageWorks active product life of 5 years, this equates to 40 replacement cycles per year, or approximately 1 cycle every 9 days. Excessive replacement cycles wear away the gold contact coating and thus destroys the integrity of the connection. The replacement cycle limit applies equally to shelf connectors and device connectors. Environments requiring a greater number of replacement cycles are not supported and are considered as improper treatment or use (paragraph 9.4b of U.S. Standard Terms and Conditions). Products or connectors damaged because of a higher number of replacement cycles are not eligible for return under warranty and standard service plans. Digital Equipment Corporation markets a distinct family of removable storage elements for higher replacement cycle environments. Contact your Digital Account Representative for more information. ------------------------------------------------------------ 3.3 Replacing a 3½-Inch SBB There are three methods for replacing 3½-inch SBBs in desktop expansion units: hot swap, warm swap, and cold-swap. · For single desktop expansion units: - The cold-swap method is normally used during initial installation or when power is removed from the desktop expansion unit. None of the storage devices are operational until the power is restored. - If the SCSI controller supports the hot-swap method, you can replace a storage device using this method provided that the storage device is not active (that is, the green device activity LED is off). ------------------------------------------------------------ CAUTION ------------------------------------------------------------ Do not use the hot-swap method unless you are positive that this method is fully supported by the SCSI controller. ------------------------------------------------------------ · For multiple desktop expansion units: The warm-swap method is used when two or more desktop expansion units are connected in series. Power can be removed from one unit without disrupting the SCSI bus. 3-4 Desktop Expansion Unit Installation The replacement methods are defined as follows: · Hot-swap--A method of device replacement whereby the complete system remains on line and active during device removal or insertion. The device being removed or inserted is the only device that cannot perform operations during this process. User applications that are not dependent upon the device being swapped are not impacted. · Warm-swap--A method of device replacement used when there are multiple expansion units, whereby the complete system remains on line during device removal or insertion. Activity may be suspended or paused for a brief period of time during device insertion or removal. No booting or loading of code is permitted except on the device being inserted. User applications that are not dependent upon the devices on the affected SCSI bus are not noticeably impacted. · Cold-swap--A method of device replacement that requires that power be removed from one or more shelves or expansion units thereby affecting other devices therein. User applications that are not dependent upon the devices being swapped are impacted as a result. This method is used when conditions preclude the use of a warm-swap or hot-swap method. Normally, this method is only used when installing or upgrading a StorageWorks subsystem. Refer to the StorageWorks Solutions Shelf and SBB User 's Guide for a detailed description of the procedures for exchanging (swapping) devices. Use the following procedure to remove or replace a 3½-inch SBB: ------------------------------------------------------------ CAUTION ------------------------------------------------------------ The 3½-inch SBB is heavy and can be damaged if dropped. Therefore, always use both hands to fully support the 3½-inch SBB during removal or installation. ------------------------------------------------------------ 1. Optional--Remove the two security screws from the enclosure. Refer to Figure 3-3. 2. Press the two SBB mounting tabs in to release the 3½-inch SBB. ------------------------------------------------------------ CAUTION ------------------------------------------------------------ To prevent electrostatic discharge (ESD) damage to a 3½-inch SBB, do not touch the SBB interface connector. ------------------------------------------------------------ 3. Support the 3½-inch SBB with both hands as you pull it from the desktop expansion unit. 4. Insert the replacement 3½-inch SBB into the guide slots and push it in until it is fully seated and the mounting tabs engage the desktop expansion unit. 5. Optional--Install the two security screws. Desktop Expansion Unit Installation 3-5 ------------------------------------------------------------ CAUTION ------------------------------------------------------------ To prevent overheating, the following conditions must be met: · Slots 1 and 2 must have either a 3½-inch SBB or a blank bezel (BA35X-Px) installed. · Slot 3 must have either a 5¼-inch, half-height storage device or be configured for a 3½-inch SBB and have either a 3½-inch SBB or a blank bezel (BA35X-Px) installed. ------------------------------------------------------------ 6. After power is applied, observe the status LEDs and verify that the green device activity LED is either on, flashing, or off, and that the amber device fault LED is off. ------------------------------------------------------------ Note ------------------------------------------------------------ The green device activity LED remains on when the SCSI cable is disconnected. ------------------------------------------------------------ 3.4 Replacing a 5¼-Inch, Half-Height Storage Device The status displays for 5¼-inch, half-height storage devices are storage device specific. See the specific storage device documentation to determine if the storage device may be replaced using the hot-swap method or whether you must use the cold-swap method. Use the following procedure to replace a 5¼-inch, half-height storage device in slot 3: ------------------------------------------------------------ CAUTION ------------------------------------------------------------ The storage device is heavy and can be damaged if dropped. Therefore, always use both hands to fully support the storage device during removal or installation. ------------------------------------------------------------ 1. Optional--Remove the two security screws from the enclosure. Refer to Figure 3-3. 2. Slide out the mounting handle, using the tabs to expose the hand grip. 3. Firmly grasp the hand grip and pull it out to release the storage device. ------------------------------------------------------------ CAUTION ------------------------------------------------------------ To prevent electrostatic discharge (ESD) damage to a storage device, do not touch the SCSI interface connector. ------------------------------------------------------------ 4. Use both hands and pull the storage device out of the desktop expansion unit. 5. Insert the replacement storage device into the guide slots and push it in. 6. Push the hand grip in until the storage device is firmly seated. 7. Push in on the mounting handle tabs. 3-6 Desktop Expansion Unit Installation 8. Optional--Install the two security screws. ------------------------------------------------------------ CAUTION ------------------------------------------------------------ To prevent overheating, the following conditions must be met: · Slots 1 and 2 must have either a 3½-inch SBB or a blank bezel (BA35X-Px) installed. · Slot 3 must have either a 5¼-inch, half-height storage device, or be configured for a 3½-inch SBB and have either a 3½-inch SBB or a blank bezel (BA35X-Px) installed. ------------------------------------------------------------ 9. After power is applied, observe the storage device status LEDs and verify that the device is functioning properly. Desktop Expansion Unit Installation 3-7 Part II ------------------------------------------------------------ Desktop Expansion Unit Service Guide Part II describes the procedures for exchanging a 5¼-inch, half-height storage device in slot 3 of the desktop expansion unit with a 3½-inch StorageWorks building block (SBB). ------------------------------------------------------------ Note ------------------------------------------------------------ Only qualified personnel, for example Digital Multivendor Customer Services, are authorized to complete the procedures described in this part. ------------------------------------------------------------ 4 ------------------------------------------------------------ Exchanging Devices and SBBs This chapter describes the procedures for exchanging 3½-inch StorageWorks building blocks (SBBs) and 5¼-inch, half-height storage devices. Either a 3½-inch SBB or a 5¼-inch, half-height storage device can be installed in slot 3 of the desktop expansion unit. The 3½-inch SBB and the 5¼-inch, half-height storage device are not the same size nor do they mount in the same manner. These differences are compensated for by the following: · A movable backplane connector, which compensates for the different lengths · 3½-inch side rails, which compensate for the difference in width and serve as SBB guide slots Use the following procedure to convert slot 3 from a 5¼-inch, half-height storage device to a 3½-inch SBB 1 : ------------------------------------------------------------ CAUTION ------------------------------------------------------------ Do not attempt the following procedure unless you have taken proper precautions against electrostatic discharge (ESD). When you remove the cover from any enclosure or device, wear an ESD grounding wrist strap. ------------------------------------------------------------ 1. Turn off the desktop expansion unit. 2. Disconnect the SCSI cables. 3. Disconnect the power cables. 4. If installed, remove the two security screws from slot 3, located on the bottom of the desktop expansion unit as shown in Figure 4-1. 5. Remove the 5¼-inch, half-height storage device from slot 3. 6. Place the desktop expansion unit on a flat surface with the bottom side up. 7. To release the cover latch, insert a flat-tip screwdriver in the hole at the rear as shown in Figure 4-2. 8. To remove the cover, use a flat-tip screwdriver to press in the three cover tabs on the left side of expansion unit, as shown in Figure 4-3, while lifting up on the cover. Remove the cover. ------------------------------------------------------------ 1 You can also refer to this procedure to convert slot 3 from a 3½-inch SBB configuration to an 5¼-inch, half-height storage device configuration. Exchanging Devices and SBBs 4-1 Figure 4-1 Desktop Expansion Enclosure--Bottom View Figure 4-2 Desktop Expansion Enclosure--Cover Latch 4-2 Exchanging Devices and SBBs Figure 4-3 Desktop Expansion Enclosure--Cover Tabs COVER TABSðTX CXO-3682A_PHðTX ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ ------------------------------------------------------------ Figure 4-5 Backplane In 3½-Inch Position CXO-3686A_PHðTX BACKPLANEðTX 3 1/2" POSITIONðTX ------------------------------------------------------------ ------------------------------------------------------------ 15. Connect the power cables. 16. Connect the SCSI cables. 17. Turn on power and check that the desktop expansion unit status LED and the SBB device activity and fault status LEDs are functioning properly. Exchanging Devices and SBBs 4-5 A ------------------------------------------------------------ Specifications This appendix describes the physical, electrical, cooling, thermal stabilization, and environmental specifications of the BA353-Ax desktop expansion unit product line. Table A-1 Physical Specifications ------------------------------------------------------------ Height Width Depth Description mm (in) mm (in) mm (in) ------------------------------------------------------------ BA353-Ax desktop expansion unit 60 (2.4) 431.8 (17.0) 400 (15.7) 3½-inch SBB 121 (4.8) 51 (2) 216 (8.5) ------------------------------------------------------------ Table A-2 Electrical Specifications ------------------------------------------------------------ Item Specification ------------------------------------------------------------ AC power supply Input 100-120/220-240 V ac (auto ranging), 1.1/0.7 A, 46-63 Hz Output 61.1 W +5 V dc ±5%, 6.0 A +12 V dc ±5%, 4.0 A (6 A peak) Slot power requirements +5 V dc ±5%, 1.0 A +12 V dc ±5%, 1.2 A Blower power requirements +12 V dc ±5%, 0.2 A Auxiliary ac output 100-120/220-240 V ac, 8.0 A, 46-63 Hz ------------------------------------------------------------ Table A-3 Cooling ------------------------------------------------------------ Item Specification ------------------------------------------------------------ System blower Front to rear air flow, 3 CFM per slot ------------------------------------------------------------ Specifications A-1 A.1 Environmental Specifications The StorageWorks product line environmental specifications listed in Table A-4 are the same as for other Digital storage devices. Table A-4 Environmental Specifications ------------------------------------------------------------ Condition Specification ------------------------------------------------------------ Optimum Operating Environment ------------------------------------------------------------ Temperature Rate of change Step change +18° to +24°C (+65° to +75°F) 3°C (5.4°F) 3°C (5.4°F) Relative humidity 40% to 60% (noncondensing) with a step change of 10% or less (noncondensing) Altitude From sea level to 2400 meters (8000 feet) Air quality Maximum particle count .5 micron or larger, not to exceed 500,000 particles per cubic feet of air Inlet air volume .009 cubic meters per second (18 cubic feet per minute) ------------------------------------------------------------ Maximum Operating Environment (Range) ------------------------------------------------------------ Temperature +10° to +35°C (+50° to +95°F) Derate 1.8°C for each 1000 meters (1.0°F for each 1000 feet) of altitude Maximum temperature gradient 11°C/hr (52°F/hr) ±2°C/hr (36°F/hr) Relative humidity 10% to 90% (noncondensing) Maximum wet bulb temperature: 28°C (82°F) Minimum dew point: 2°C (36°F) ------------------------------------------------------------ Maximum Nonoperating or Storage Environment (Range) ------------------------------------------------------------ Temperature Nonoperating Storage +18° to +29°C (+65° to +85°F) -40° to +66°C (-40° to +151°F) Relative humidity Nonoperating Storage 10% to 90% (noncondensing) 8% to 95% in original shipping container (noncondensing); otherwise, 50% (noncondensing) Altitude From -300 meters (-1000 feet) to +3600 meters (+12,000 ft) MSL ------------------------------------------------------------ A-2 Specifications A.2 Environmental Stabilization To make sure of the proper operation of Digital storage devices, the SBB temperature must be within 18-29°C (65-85°F). Table A-5 specifies the time required to thermally stabilize SBBs based on the ambient shipping temperature. ------------------------------------------------------------ CAUTION ------------------------------------------------------------ Always stabilize storage devices in the operating environment prior to installation or operation. Otherwise, the media or associated electronics may be damaged when power is applied to the unit. ------------------------------------------------------------ If condensation is visible on the outside of the storage device: Stabilize the device and the SBB in the operating environment for 6 hours or until the condensation is no longer visible, whichever is longer. Do not insert the storage device into the shelf until it is fully stabilized. If condensation is not visible on the outside of the storage device: Thermally stabilize the device for the amount of time specified in Table A-5. Table A-5 Thermal Stabilization Specifications ------------------------------------------------------------ Ambient Temperature Range °C Ambient Temperature Range °F Minimum Stabilization Time ------------------------------------------------------------ 60 to 66 140 to 151 3 hours 50 to 59 122 to 138 2 hours 40 to 49 104 to 120 1 hour 30 to 39 86 to 102 30 minutes 18 to 29 64 to 84 None 10 to 17 50 to 63 30 minutes 0 to 9 32 to 48 1 hour -10 to -1 14 to 30 2 hours -20 to -11 -4 to 12 3 hours -30 to -21 -22 to -6 4 hours -40 to -31 -40 to -24 5 hours ------------------------------------------------------------ Specifications A-3 ------------------------------------------------------------ Glossary ac distribution The method of distributing ac power in a cabinet. adapter See SCSI signal bus converter. ANSI American National Standards Institute building block shelf See SBB. cold-swap A method of device replacement that requires that power be removed from one or more shelves thereby affecting other devices therein. User applications that are not dependent upon the devices being swapped are impacted as a result. This method is used when conditions preclude the use of a warm-swap or hot-swap method. Normally, this method is only used when installing or upgrading a StorageWorks subsystem. See also warm-swap and hot-swap. controller A hardware/firmware device that manages communications on behalf of host systems over the SCSI bus to devices, such as the HSC-series, HSJ-series, and HSZ-series controllers. Controllers typically differ by the type of interface to the host and provide functions beyond what the devices support. DAT Digital Audio Tape. A method of recording data on a cartridge tape. desktop expansion unit A low-profile, SCSI based unit with self-contained power and cooling that can accommodate either three 3½-inch SBBs or two 3½-inch SBBs and one, half-height 5¼-inch storage device. This unit is used with workstations and PCs and can be positioned either adjacent to or beneath the CPU or monitor. differential SCSI bus A signal's level is determined by the potential difference between two wires. A differential bus is more robust and less subject to electrical noise than is a single-ended bus. Glossary-1 digital audio tape See DAT. disk A storage device supporting random access to fixed size blocks of data. disk array controller See controller. DWZZA The StorageWorks compatible SCSI bus signal converter. See SCSI bus signal converter. electromagnetic interference See EMI. electrostatic discharge See ESD. EMI Electromagnetic interference. The impairment of a signal by an electromagnetic disturbance. ESD Electrostatic discharge. The discharge of a potentially harmful static electric voltage as a result of improper grounding. FRU Field replaceable unit half-height (1) In the storage industry, a device of conventional dimensions, except for height. (2) A device that occupies only one-half of a 5¼-inch SBB. The first half-height device is always mounted in the lower (bottom) part of the SBB. The second device in an SBB is mounted in the upper (top) part of the SBB. host The primary or controlling computer or any such (in a multiple computer network) to which storage is attached. hot-swap A method of device replacement whereby the complete system remains on line and active during device removal or insertion. The device being removed or inserted is the only device that cannot perform operations during this process. User applications that are not dependent upon the device being swapped are not impacted. See also cold-swap and warm-swap. QIC Quarter-inch cartridge. A standard tape media. Glossary-2 RAID Redundant Array of Independent Disks rank The number of devices in a RAID set. RFI Radio frequency interference. The impairment of a signal by an unwanted radio signal or radio disturbance. SBB StorageWorks building block. The basic building block of the StorageWorks product line. Any device conforming to shelf mechanical and electrical standards installed in either a 3½-inch or 5¼-inch carrier is considered to be an SBB, whether it be a storage device, a power supply, or other device. SBB shelf The common name for any StorageWorks shelf that contains only power supply and storage SBBs. SCSI Small Computer System Interface. This ANSI interface defines the physical and electrical parameters of a parallel I/O bus used to connect computers and a maximum of seven devices. The StorageWorks subsystem implementation uses SCSI-2, for the synchronous transfer of 8-bit data at rates of up to 10 MB/s. SCSI device A host computer adapter, a peripheral controller, or an intelligent peripheral that can be attached to the SCSI bus. SCSI device ID The bit-significant representation of the SCSI addressing referring to one of the signal lines numbered 0 through 7. Also referred to as target ID. SCSI-A cable A 50-conductor (25 twisted pair) cable used for single-ended, SCSI-2 bus connections. SCSI-P cable A 68-conductor (34 twisted pairs) cable used for differential bus connections. single-ended SCSI bus Each signal's logic level is determined by the voltage of a single wire in relation to ground. Small Computer System Interface See SCSI. storage array An integrated set of storage devices. Glossary-3 StorageWorks The Digital set of enclosure products that allows customers to design and configure their own storage subsystem. Components include power, packaging, and interconnections in a StorageWorks shelf. SBBs and array controllers are integrated therein to form storage subsystems. System-level enclosures to house the shelves and standard mounting devices for SBBs are also included. StorageWorks building block See SBB. supported device (1) A device that has been fully evaluated in an approved StorageWorks configuration (that is, shelf, cabinet, power supply, cabling, and so forth) and is in complete compliance with country-specific standards (for example, FCC, TUV, and so forth) and with all Digital standards. (2) A device supported by a controller or host operating system. tape A storage device supporting sequential access to variable sized data records. tape controller See controller. target A SCSI device that performs an operation requested by an initiator. target ID See SCSI device ID. warm-swap A method of device replacement whereby the complete system remains on line during device removal or insertion. Activity may be suspended or paused for a brief period of time during device insertion or removal. No booting or loading of code is permitted except on the device being inserted. User applications that are not dependent upon the devices on the affected SCSI bus are not noticeably impacted. See also cold-swap and hot-swap. Glossary-4 ------------------------------------------------------------ Index 3½-inch SBB installing, 3-2 A ------------------------------------------------------------ ac power, 2-1 input, 2-1 output, 2-1 power cords, 1-3 switch, 2-1 B ------------------------------------------------------------ Blower, 2-2 Blower status, 2-2 C ------------------------------------------------------------ Cables BC09D, 1-4 BN21H, 1-4 BN21R, 1-4 BN31B, 1-4 power, 1-3 SCSI, 1-4 Certification Canadian Standard Association, vii TUEV Product Service GmbH, vii Underwriter Laboratories, vii Cold-swap, 3-5 Configuration included devices, 1-2 power supply, 1-2 rules, 1-3 standard, 1-2 Cooling, 2-1 air flow rate, 2-1 power supply, 2-1 Cord power, 1-3 D ------------------------------------------------------------ Desktop expansion unit order numbers, 1-2 status LED, 2-2 Device addresses, 2-4 TZ30-VE Cartridge Tape Drive, 2-6 Diagnostics, 2-2 E ------------------------------------------------------------ Environmental specifications, A-2 Environmental stabilization, A-3 F ------------------------------------------------------------ Field replaceable unit See FRU FRU, 2-2 H ------------------------------------------------------------ Hot-swap, 3-5 I ------------------------------------------------------------ Installation, 3-1 3½-inch SBBs, 3-2 5¼-inch, half-height devices, 3-2 ac power cords, 3-1 desktop expansion unit, 3-1 preferred configuration, 3-1 SCSI cable, 3-2 security screws, 3-2 P ------------------------------------------------------------ Power, 2-1 blower, 2-1 +5 V dc, 2-1 +12 V dc, 2-1 Power cables, 1-3 Power supply, 2-2 Power supply status, 2-2 Product description, 1-1 R ------------------------------------------------------------ Removing 3½-inch SBBs, 3-4 procedure, 3-5 Removing 5¼-inch, half-height storage device procedure, 3-6 Index-1 Replacing 3½-inch SBBs, 3-4 cold-swap method, 3-4 hot-swap method, 3-4 procedure, 3-5 warm-swap method, 3-4 Replacing 5¼-inch, half-height storage device procedure, 3-6 S ------------------------------------------------------------ SBB side rails installation, 4-1 slot 3 device installation, 4-1 slot 3 movable backplane, 4-1 SBB replacement cold-swap, 3-5 hot-swap, 3-5 warm-swap, 3-5 SCSI "A" cable specifications, 1-4 adapter, 1-4 bus length, 1-4 bus speed, 1-4 bus termination, 2-4 cable length, 1-4 connectors, 1-4 device addresses, 2-4 movable backplane, 4-1 SCSI "A" cable specifications, 1-4 SCSI bus addresses, 2-4 controller device address, 2-4 data transfer rate, 1-5 device address, 2-6 device addresses, 2-4 internal length, 2-4 length, 1-5, 2-4 maximum devices, 1-5 serially connected, 1-5 target ID, 2-4 termination, 2-4 transfer rate, 2-4 SCSI Cables, 1-4 Security storage devices, 3-2 Service, 4-1 exchanging storage devices, 4-1 Small Computer System Interface See SCSI Specifications, A-1 cooling, A-1 electrical, A-1 environmental, A-2 environmental stabilization, A-3 physical, A-1 Status LED device fault error conditions, 2-3 Status LEDs 3½-inch SBBs, 2-2 5¼-inch, half-height devices, 2-2 control of, 2-3 device activity, 2-2 device fault, 2-2 power, 2-2 Storage devices, 1-7 3½-inch SBB, 1-7 5¼-inch, half-height, 1-3, 1-7 exchanging, 1-7 included, 1-2 installing, 1-7 optional, 1-2 qualified, 1-3 specifications, 1-2 Switches device address, 2-6 T ------------------------------------------------------------ Temperature ranges, A-3 Terminating SCSI bus, 2-4 Thermal stabilization, A-3 TZ30-VE Cartridge Tape Drive device addressing, 2-6 W ------------------------------------------------------------ Warm-swap, 3-5 Index-2