Chapter 8
Diagnosing and Correcting FC-AL Loop Problems
8-15
8.3.7
Using CLI Diagnostic Commands
Once the
syslog
file has been examined for warning or error messages and a
conclusion is reached on which loop might have failed, other CLI commands can be
used to verify or support that conclusion. These commands display the various
status and current configuration of the loops.
Use a serial cable and Tip session to collect and analyze both controller’s loop status
information. The serial cable is necessary to see the loop configuration for the
alternate controller, as the Telnet session only displays the current loop status as
seen from the master controller.
For the example problem above, the CLI commands produce these results.
■
The
fru stat
command would show a normal status for this failure.
■
The
vol mode
command would show a normal status for this failure.
■
The
port listmap
command would show a normal status for this failure.
■
The
.loop stat
command would show a normal status for this failure.
■
The
.disk pathstat
command would show a normal status for this failure.
■
The
.disk linkstat
command would show the following error conditions for
this failure.
When the
.disk linkstat
command is run from the master controller, it is unable
to access any of the link registers for drives u1d1-9. This supports the conclusion
that loop 1 (path 0) has had a failure.
Once a suspect loop has been determined, use a process of elimination to locate the
failed FRU on that loop as described in the following sections.
CODE EXAMPLE 8-12
Example
.disk linkstat
Error Data
.disk linkstat u1d1-9 path 0 (master controller)
DISK LINKFAIL LOSSSYNC LOSSSIG PROTOERR INVTXWORD INVCRC
--------------------------------------------------------
u1d1 Disk Link Status Failed
u1d2 Disk Link Status Failed
u1d3 Disk Link Status Failed
u1d4 Disk Link Status Failed
u1d5 Disk Link Status Failed
u1d6 Disk Link Status Failed
u1d7 Disk Link Status Failed
u1d8 Disk Link Status Failed
u1d9 Disk Link Status Failed
fail
Содержание StorEdge T3+
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