·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 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 |
| | | |
2–2Using the DS-DWZZH-05 UltraSCSI Hub in a Cluster Configuration