Technical data

of the bus segment. Termination for the other end of the bus segment is
provided by the folowing components:
• Installed KZPBA-CB (or KZPSA-BB) termination resistor SIPs
• External termination on a trilink connector that is attached to an HSZ40,
HSZ50, HSZ70, or HSZ80
______________________ Note _______________________
The DS-DWZZH-03/05 UltraSCSI hubs cannot be connected to a
StorageWorks BA35X storage shelf because the storage shelf does
not provide termination power to the hub.
3.6.1 Using a DWZZH UltraSCSI Hub in a Cluster Configuration
The DS-DWZZH-03 and DS-DWZZH-05 UltraSCSI hubs are supported in a
TruCluster Server cluster. They both provide radial connection of cluster
member systems and storage, and are similar in the following ways:
• Contain internal termination for each port; therefore, the hub end of
each SCSI bus segment is terminated.
_____________________ Note _____________________
Do not put trilinks on a DWZZH UltraSCSI hub because it is
not possible to remove the DWZZH internal termination.
• Require that termination power (termpwr) be provided by the SCSI bus
host adapters on each SCSI bus segment.
_____________________ Note _____________________
The UltraSCSI hubs are designed to sense loss of termination
power (such as a cable pull or termpwr not enabled on the
host adapter) and shut down the applicable port to prevent
corrupted signals on the remaining SCSI bus segments.
3.6.1.1 DS-DWZZH-03 Description
The DS-DWZZH-03:
• Is an 8.9-centimeter (3.5-inch) StorageWorks building block (SBB).
• Can be installed in:
Shared SCSI Bus Requirements and Configurations Using UltraSCSI Hardware 3–9