Compaq AA-RHGWC-TE manual DS-DWZZH-05 Description, DS-DWZZH-05 Configuration Guidelines

Figure 3–2: DS-DWZZH-03 Front View

Differential symbol

ZK-1412U-AI

The differential symbol (and the lack of a single-ended symbol) indicates that all three connectors are differential.

3.6.1.2 DS-DWZZH-05 Description

The DS-DWZZH-05:

•Is a 5.25-inch StorageWorks building block (SBB).

•Has five Very High Density Cable Interconnect (VHDCI) differential SCSI bus connectors.

•Uses SCSI ID 7 whether or not fair arbitration mode is enabled. Therefore, you cannot use SCSI ID 7 on the member systems’ SCSI bus adapter.

The following section describes how to prepare the DS-DWZZH-05 UltraSCSI hub for use on a shared SCSI bus in more detail.

3.6.1.2.1 DS-DWZZH-05 Configuration Guidelines

The DS-DWZZH-05 UltraSCSI hub can be installed in:

•A StorageWorks UltraSCSI BA356 shelf (which has the required 180-watt power supply).

•A non-UltraSCSI BA356 that 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.

3–10Shared SCSI Bus Requirements and Configurations Using UltraSCSI Hardware