DEC DS-HSZ22-AA, User Manual

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Chapter 2. RAID Array Controller
EK–SMCPO–UG. A01 2–5
Table 2–1 Controller Specifications (Continued)
Item Specifications
Disk Warm Spare (not spinning) Yes, global warm spare
Redundant Power Supplies Yes
Redundant Controllers Yes
Controller Failover Yes, automatic
Controller Hot Spare Yes (Active-Passive mode)
Controller Hot Swap Yes
Cluster Support Yes, Single (SCSI) bus cluster
Maximum number of units presented to
host 64
Maximum host port transfer speed 20 MHz
Command Queuing Yes, 64 commands (host and disk SCSI chan-
nels)
Heterogeneous Multi-Host Support Yes
Mixed Drive Types Yes
Configurable Reconstruct Time Yes
Stripe Size (chunk size) Variable
Write through Cache Yes, User Selectable (default)
Write Back Cache Yes, User Selectable (optional)
Write on Top Yes
Write Gathering Yes
Battery Backup for Cache Yes, Pedestal Uninterruptable Power Supply
(UPS)
Boot Capability Bootable from RAID set (System dependent)
Number of Controllers /System Two
Cache Support Up to 256 MB (using two 128 MB industry-
standard, 72-pin, 36-bit, 60 ns SIMMS)
FCC Rating Class B
Environmental
Temperature 5ºC to 50ºC operating, -40ºC to +60ºC non-
operating
Relative Humidity 10% to 95% non-condensing (operating), 5% to
90%, non-condensing (non-operating)
Physical Size 8.55” deep, 5.03” wide, 1.6” high
Power Requirements 5 VDC @ 3 A, peak; - 12 VDC @ 1 A, peak