Sun Microsystems Sun StorEdge T3, Installation, Operation And Service Manual

Page: 95 / 148

4-1
C H A P T E R
4
Troubleshooting
This chapter describes how to approach troubleshooting the Sun StorEdge T3 disk
tray. Use the information in this chapter along with the Sun StorEdge T3 Disk Tray
Administrator’s Guide or Sun StorEdge Component Manager User’s Guide to determine
the service required. This chapter is organized as follows:
■
“Analyzing the Problem” on page 4-1
■
“Channel Connection Failures” on page 4-9
■
“FRU Failures” on page 4-9
4.1 Analyzing the Problem
To begin the problem analysis, check one or a combination of the following four
resources:
■
A host-generated message, found in the
/var/adm/messages
file, indicating a
problem with the host-channel connection to the disk tray unit
■
A message generated by the Sun StorEdge Component Manager software
indicating a problem
■
A telnet session that monitors the disk tray unit for its status
■
The disk tray LEDs, which provide a visual status
4.1.1 Host-Generated Message
The data host sees the disk tray as one or two logical volumes. A host-generated
message might indicate that the host cannot communicate with the disk tray through
the FC-AL channel, or that an excessive number of channel errors are occurring. If
the host loses access to the disk tray through the channel connection, then any host