Most devices have internal termination. For example, the UltraSCSI
KZPBA-CB and the fast and wide KZPSA-BB host bus adapters have
internal termination. When using a KZPBA-CB or KZPSA-BB with an
UltraSCSI hub, ensure that the onboard termination resistor SIPs have
not been removed.
Youwill need to providetermination at the storage end of one SCSI bus
segment. You will install an H8863-AA trilink connector on the HSZ70 or
HSZ80 at the bus end. Connect an H8861-AA terminator to the trilink
connector to terminate the bus.
Figure 3–1 shows a VHDCI trilink connector (UltraSCSI), which you may
attach to an HSZ70 or HSZ80.
Figure 3–1: VHDCI Trilink Connector (H8861-AA)
CXO5744A
3.6 UltraSCSI Hubs
The DS-DWZZH series UltraSCSI hubs are UltraSCSI signal converters
that provide radial connections of differential SCSI bus adapters and RAID
array controllers. Each connection forms a SCSI bus segmentwith SCSI bus
adapters or the storage unit. The hub provides termination for one end
of the bus segment. Termination for the other end of the bus segment is
provided by the:
•Installed KZPBA-CB (or KZPSA-BB) termination resistor SIPs
•External termination on a trilink connector attached to an UltraSCSI
BA356 personality module (DS-BA35X-DA), HSZ70, or HSZ80
______________________ Note _______________________
The DS-DWZZH-03/05 UltraSCSI hubs cannot be connected to a
StorageWorksBA35X storage shelf becausethe storage shelf does
not provide termination power to the hub.
3–8Shared SCSI Bus Requirements and Configurations Using UltraSCSI Hardware