HP A7143A RAID160 SA Controller Support Guide

Installing the RAID160 SA Controller
Connecting the Cables and the StorageWorks‘ Disk Enclosures
Chapter 466
Connecting the Cables and the
StorageWorks Disk Enclosures
• Each channel on the RAID160 SA controller supports up to 14 drives
• Ports 1 and 2 each have two SCSI connectors, one for external
storage units and one for internal hard drives in the server
• The internal and external connectors on channel 1 cannot be used
simultaneously
• The internal and external connectors on channel 2 cannot be used
simultaneously
• Ports 3 and 4 can only be connected to external storage units
NOTE Currently the internal ports on the RAID160 SA controller are not
supported.
Peripherals attached to any of the connectors must have a unique SCSI
ID value in the range of 0 to 15 (except ID 7, which is reserved for
controller use). The SCSI ID value determines the priority given to the
device when it attempts to use the SCSI bus.
The supported HP StorageWorks disk enclosures automatically set the
SCSI IDs for the physical disks they contain.
IMPORTANT To preserve an existing configuration when replacing an existing
RAID160 SA controller with a different RAID160 SA controller, be
certain to reconnect the SCSI cables to the same channels on the
replacement controller as the channels they had been connected to on the
original controller, (channel 1 to channel 1, channel 2 to channel 2, and
so on).
To prevent signal degradation, SCSI buses require termination on both
ends. In HP servers and storage systems, the controller, SCSI cable, and
backplane provide the required termination.