Re: Reset fibre channel HBA

Wait for the command to timeout then:

powermt remove hba=0
rmdev -Rdl fcs0

BV

----- Original Message ----
From: Paul Deveau <pdeveau@xxxxxxxxxx>
To: aix-l@xxxxxxxxxxxxx
Sent: Thursday, July 12, 2007 8:45:26 AM
Subject: Reset fibre channel HBA

Hi,

I have a p570 connected to an EMC SAN. How can I reset a fibre channel
HBA? We lost the path to fabric a and would like to restore. Running
diag or cfgmgr hangs at the device driver, and after doing a Crtl-C the
process becomes a zombie:

cfgmgr or running diag on fcs0:

root 1753206 1 0 09:58:20 pts/6 0:07 /usr/lib/methods/cfgefscsi -l
fscsi0

Hangs at FC device driver fscsi0.


Here are other symptoms:

1. "errpt" shows lots of fcs0 "Link Error":

B8113DD1 0710152107 T H fcs0 LINK ERROR
B8113DD1 0710151707 T H fcs0 LINK ERROR
B8113DD1 0710151407 T H fcs0 LINK ERROR
B8113DD1 0710151207 T H fcs0 LINK ERROR

2. "powermt display":

Symmetrix logical device count=10
CLARiiON logical device count=0

=============================================================================
----- Host Bus Adapters --------- ------ I/O Paths ----- ------ Stats
-----
### HW Path Summary Total Dead IO/Sec Q-IOs
Errors

=============================================================================
0 fscsi0 failed 10 10 - 0
30
1 fscsi1 optimal 10 0 - 0
0

shows Path A or 0 id dead. "powermt display dev=all" shows Path0 disks
dead.

3. "powermt restore" hangs


So, the question is, how to reset FC device driver fscsi0 without
rebooting? Any suggestions? TIA.


Paul Deveau
University of Ottawa





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