Scsi Cables; Fru Replacement; Host Adapter - Sun Microsystems StorEdge D2 Array Best Practices Manual

5.1.2

SCSI Cables

The most common problem involving SCSI cables is with bent pins on the
connectors. This usually occurs during a system installation. A typical indication of
a defective SCSI cable is an error message indicating SCSI parity errors and the SCSI
transfer rate has been reduced or has switched from wide to narrow SCSI. A SCSI
cable that has failed on the host side usually results in a data path failure indication.
If the problem is with a failed SCSI cable on the drive side, the result is usually in
the form of a drive side channel failure indication. Currently there are no procedures
for testing a SCSI cable for failure other than to replace it with a new or known good
cable. Also, ensure that the SCSI bus length is within the recommended maximum of
12 meters (see Section 2.1.2, "SCSI Cables" on page 2-2).
5.2

FRU Replacement

This section contains replacement information on the following FRUs:
Section 5.2.1, "Host Adapter" on page 5-2
Section 5.2.2, "Interconnect Cables" on page 5-3
Refer to the Sun StorEdge D2 Installation, Operations, and Service Manual for detailed
instructions on removing and replacing FRUs.
5.2.1

Host Adapter

If the host server does not support hot swapping of the I/O boards, you will need to
shut down the host to replace a host adapter. You should read the manual that ships
with the host adapter and become familiar with the installation procedure.
Note – There are several sections in the Sun Enterprise Cluster System Hardware
Service Manual that provide detailed procedures on how to disconnect a host and to
remove and replace an host adapter.
Currently, the Sun PCI Dual Ultra3 SCSI host adapter is the only host adapter that
supports the Sun StorEdge D2 array.
5-2 Sun StorEdge D2 Array Best Practices Guide • January 2002