Ds-Dwzzh Ultrascsi Hub Maximum Configurations - Compaq TruCluster Server AA-RHGWB-TE Manual

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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 storage shelf only to provide its
power and mechanical support (it is not connected to the shelf internal SCSI
bus).
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When the DS-DWZZH-05 is installed, its orientation is rotated
90 degrees counterclockwise from what is shown in Figure 3–3
and Figure 3–4.
The maximum configurations with combinations of DS-DWZZH-03 and
DS-DWZZH-05 UltraSCSI hubs, and disks in the same storage shelf
containing dual 180-watt power supplies, are shown in Table 3–3.
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With dual 180-watt power supplies installed, there are slots
available for six 3.5-inch SBBs or two 5.25-inch SBBs.
Table 3–3: DS-DWZZH UltraSCSI Hub Maximum Configurations
DS-DWZZH-03 DS-DWZZH-05
5 0
4 0
3 0
2 0
1 0
0 2
3 1
2 1
Shared SCSI Bus Requirements and Configurations Using UltraSCSI Hardware 3–11
Note _____________________
Note _______________________
Note _______________________
a
Disk Drives Personality
Module
0 Not Installed
0
Installed
3 Installed
4 Installed
5
Installed
0 Not Installed
0 Not Installed
1
Installed
b c