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RZ25L Fixed Disk Drive: SCSI ID Settings and Hardware Specifications	

EK-VX465-IN. B01	
October 1993	

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Introduction	

This document provides the SCSI ID settings and hardware specifications for	
the RZ25L fixed disk drive. Use the instructions in your system documentation	
to install the RZ25L disk drive, and to select a SCSI ID setting.	

Setting the SCSI ID	

Before you install the RZ25L 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.

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Figure 1 SCSI ID for the RZ25L Fixed Disk Drive

	

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Table 1 RZ25L Hardware Specifications	

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Formatted Storage Capacity	

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Per drive	535 MB	

Per surface	90.7 MB	

Bytes per track	48,460 (average)	

Bytes per block	512	

Spare blocks per track	1	

Spare cylinders	2	

Buffer size	240 KB	


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Performance	

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Data transfer rate to/from media	5.25 MB/sec (maximum)	

Seek time track to track	1.5 msec	

Seek time average	10.5 msec	

Seek time maximum (full stroke)	23 msec	

Average latency	5.4 msec	

Rotational speed	5411 rpm	 0.5%	

Interleave ratio	1:1

(continued on next page)

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Table 1 (Cont.) RZ25L Hardware Specifications

Operating Conditions	

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Ambient temperature	5°C to 50°C (41°F to 122°F)	

Relative humidity	8%-80%	

Altitude	305 m to 3048 m (-1000 ft to 10,000 ft)	

Maximum wet bulb temperature	28°C (82°F) (noncondensing)	

Heat dissipation	8.4W (seeking) 7W	
(typical)	

Temperature gradient	20°C/hr (36°F/hr)	


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Nonoperating Conditions	

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Ambient temperature	-40°C to 70°C (-40°F to 158°F)	

Relative humidity	5%-95%	

Altitude	-305 m to 12,210 m(1000 ft to 40,000 ft)	

Maximum wet bulb temperature	46°C (115°F)	

Temperature gradient	25°C (45°F/hr)	

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© Digital Equipment Corporation 1993. All rights reserved.	
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