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DIGITAL Server Cluster Kits for Windows NT Configuration Guide
DS-SWXRA-HB
RA7000 Pedestal Disk Expansion Cabinet
Requires
: Expansion Cable Kit (DS-SWXRA-HB) for each
Disk Expansion Cabinet
DS-BA370-AA
RA7000 Rackmount Disk Expansion Cabinet
Requires
: Expansion Cable Kit (DS-SWXRA-HB) for each
Disk Expansion Cabinet
DS-SWXRA-GD
RA3000 Disk Expansion Cabinet
Includes
: 120/240 V, with space for an additional 7 Ultra-
SCSI disk drives, expansion SCSI cable
Requires
: another Software Platform Kit
Step 4 Order Storage Building Blocks (SBB) for the storage and/or expansion cabinets.
The following table compares the 9GB and 18GB disk drives:
Model number
DS-RZ1EF-VA
1
DS-RZ40-VA
DS-RZ1EF-VW
1
DS-RZ1DF-VW
FR-RZ1DB-VW
Capacity (GB)
18.2
9.1
18.2
9.1
Interface
Fast SCSI-2
Fast SCSI-2
UltraSCSI
UltraSCSI
Transfer rate
(MB per second)
10 (Narrow)
10 (Narrow)
20 (F10)
20 (F10)
Internal data rate
(Mbits/sec - max)
170
121
170
121
Cache
1 MB
1 MB
1 MB
1 MB
Average seek Read/
Write (ms)
7.5/8.5
7.5/8.5
7.5/8.5
7.5/8.5
Average latency
(ms)
4.17
4.17
4.17
4.17
Recording method
PRML
Peak
PRML
Peak
Head type
MR
MR
MR
MR
RPM
7,200
7,200
7,200
7,200
Power (idle watts)
14.5
13.0
14.5
13.0
Height (inches)
1.6
1.6
1.6
1.6
Form factor (inches)
3.5
3.5
3.5
3.5
1
Supported on the RA450, RA7000, and RA3000