Compaq AA-RHGWC-TE manual DS-DWZZH UltraSCSI Hub Maximum Configurations, DS-DWZZH-03 DS-DWZZH-05

•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 Drivesa	Personality
			Moduleb c
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
1	1	2	Installed
0	1	3	Installed

aDS-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.

bIf the personality module is installed, you can install a maximum of four DS-DWZZH-03 UltraSCSI hubs.

cThe 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