Storage Subsystems Troubleshooting Guide

44 Sun StorEdge 3900 and 6900 Series Troubleshooting Guide March 2002
CODE EXAMPLE 3-8 Failed Path marked “unusable”
FRU tests available for the A4/B4 FC Link
Segment
The switchtest can only be run from the Storage Service Processor
The linktest will be able to isolate the switch and the GBIC on the switch. It
will not be able to isolate the cable or the Sun StorEdge T3+ array controller.
To Isolate the A4/B4 FC Link
1. Quiesce the I/O on the A4/B4 FC link path.
2. Run linktest from the Storage Automated Diagnostic Environment GUI to
isolate suspected failing components.
Alternatively, follow these steps:
1. Quiesce the I/O on the A4/B4 FC link path.
2. Run switchtest to test the entire link (re-create the problem).
3. Break the connnection by uncabling the link.
4. Insert the loopback connector into the switch port.
# cfgadm -al
Ap_Id Type Receptacle Occupant Condition
ac0:bank0 memory connected configured ok
ac0:bank1 memory empty unconfigured unknown
c1 scsi-bus connected configured unknown
c16 scsi-bus connected unconfigured unknown
c18 scsi-bus connected unconfigured unknown
c19 scsi-bus connected unconfigured unknown
c1::dsk/c1t6d0 CD-ROM connected configured unknown
c20 fc-private connected unconfigured unknown
c21 fc-fabric connected configured unknown
c21::50020f2300006355 disk connected configured unusable