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• A StorageWorks DS-BA356 shelf (which has the required 180-watt
power supply).
• A wide BA356 which has been upgraded to the 180-watt power supply
with the DS-BA35X-HH option.
_____________________ Note _____________________
Dual power supplies are recommended for any BA356 shelf
containing a DS-DWZZH-05 UltraSCSI hub in order to
provide a higher level of availability between cluster member
systems and storage.
• 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 DS-DWZZH-05 UltraSCSI hub uses the DS-BA356, BA356, or BA370
shelf only to provide its power and mechanical support (it is not connected
to the shelf internal SCSI bus).
Maximum configurations with combinations of DS-DWZZH-03 (see
technical update TU-DWZZH-03) and DS-DWZZH-05 UltraSCSI hubs, and
disks in the same DS-BA356 or BA356 storage shelf containing dual
180-watt power supplies are shown in Table 2–1.
_______________________ Note _______________________
With dual 180-watt power supplies installed, there are slots
available for six 3.5-inch SBBs or two 5.25-inch SBBs.
Table 2–1: DS-DWZZH UltraSCSI Hub Maximum Configurations
DS-DWZZH-03 DW-DWZZH-05 Disk Drives
a
Personality
Module
bc
5 0 0 Not Installed
4 0 0 Installed
3 0 3 Installed
2 0 4 Installed
1 0 5 Installed
0 2 0 Not Installed
3 1 0 Not Installed
2 1 1 Installed
2–2 Using the DS-DWZZH-05 UltraSCSI Hub in a Cluster Configuration