------------------------------------------------------------

------------------------------------------------------------


dt	

RZ28 Fixed Disk Drive: SCSI ID Settings and Hardware Specifications	

EK-VX468-IN. A01	
August 1993	

------------------------------------------------------------

------------------------------------------------------------


Introduction	

This document provides the SCSI ID settings and lists the hardware	
specifications for the RZ28 fixed disk drive. Use the instructions in your	
system's options guide to install the RZ28 fixed disk drive, and for information	
on choosing a SCSI ID setting.	

Setting the SCSI ID	

Before you install the RZ28 fixed disk drive in the system unit, you need	
to verify the position of the removable electrical jumpers on the drive. The	
position of the jumpers determines the drive's SCSI ID address.	

Your fixed disk drive may have been shipped with all of the jumpers attached	
(to prevent loss of jumpers during shipping and unpacking). In this case, the	
SCSI ID is set to 7, and you will need to change it.	

Set the SCSI ID as shown in Figure 1. Save any jumpers you remove. You	
may need them later.

1
	

Figure 1 SCSI ID for the RZ28 Fixed Disk Drive

	

2

	

Table 1 RZ28 Hardware Specifications	

------------------------------------------------------------

Formatted Storage Capacity	

------------------------------------------------------------

Per drive	2.1 GB	

Bytes per track	30 208	

Gigabytes per drive	2104	

Bytes per surface	144 683 520	

Buffer size	1024 KB	


------------------------------------------------------------

Performance	

------------------------------------------------------------

Transfer rate to/from media	2.7 MB/sec	

Interface transfer rate, synchronous	10 MB/sec	

Interface transfer rate, async	5 MB/sec	

Seek time track to track	1 msec	

Seek time average	10 msec	

Seek time maximum (full stroke)	 20 msec	

Average rotational latency	5.6 msec	

Rotational speed	5400 rpm	


------------------------------------------------------------

Operating Conditions	

------------------------------------------------------------

Ambient temperature	5°C to 55°C	
(41°F to 131°F)	

Relative humidity	10% to 90%	


------------------------------------------------------------

Nonoperating Conditions	

------------------------------------------------------------

Ambient temperature	-40°C to 66°C	
(-104°F to 150°F)	

Relative humidity	8% to 95%,	
noncondensing	

------------------------------------------------------------



------------------------------------------------------------

------------------------------------------------------------


© Digital Equipment Corporation 1993. All rights reserved.	
S2321

3