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• 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).
______________________ Note _______________________
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.
______________________ 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 3–3: DS-DWZZH UltraSCSI Hub Maximum Configurations
DS-DWZZH-03 DS-DWZZH-05
Disk Drives
a
Personality
Module
bc
500
Not Installed
400
Installed
303
Installed
204
Installed
105
Installed
020
Not Installed
310
Not Installed
211
Installed
112
Installed
013
Installed
a
DS-DWZZH UltraSCSI hubs and disk drives may coexist in a storage shelf. Installed disk drives are not
associated with the DS-DWZZH UltraSCSI hub SCSI bus segments; they are on the SCSI bus connected to
the personality module.
b
If the personality module is installed, you can install a maximum of four DS-DWZZH-03 UltraSCSI hubs.
c
The personality module must be installed to provide a path to any disks installed in the storage shelf.
Shared SCSI Bus Requirements and Configurations Using UltraSCSI Hardware 3–11