Compaq StorageWorks TM RAID Array 3000 Pedestal Storage Subsystem Manuel de service Page 74

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A StorageWorks UltraSCSI BA356 storage shelf (which has the
required 180-watt power supply).
The lower righthand device slot of the BA370 shelf within the RA7000
or ESA 10000 RAID array subsystems. This position minimizes cable
lengths and interference with disks.
A non-UltraSCSI BA356 that has been upgraded to the 180-watt
power supply with the DS-BA35X-HH option.
Uses the storage shelf only to provide its power and mechanical support.
(It is not connected to the shelf internal SCSI bus.)
Has three Very High Density Cable Interconnect (VHDCI) differential
SCSI bus connectors.
Does not use a SCSI ID.
DS-DWZZH-03 and DS-DWZZH-05 UltraSCSI hubs may be housed in the
same storage shelf with disk drives. Table 3–3 provides the supported
configurations.
Figure 3–2 shows a front view of the DS-DWZZH-03 UltraSCSI hub.
Figure 3–2: DS-DWZZH-03 Front View
Differential symbol
ZK-1412U-AI
The differential symbol (and the lack of a single-ended symbol) indicates
that all three connectors are differential.
3.6.1.2 DS-DWZZH-05 Description
The DS-DWZZH-05:
Is a 13.33-centimeter (5.25-inch) StorageWorks building block (SBB).
Has five Very High Density Cable Interconnect (VHDCI) differential
SCSI bus connectors.
Uses SCSI ID 7 whether or not fair arbitration mode is enabled.
Therefore, you cannot use SCSI ID 7 on the member systems’ SCSI bus
adapter.
3–10 Shared SCSI Bus Requirements and Configurations Using UltraSCSI Hardware
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