Re: Reset fibre channel HBA

Two ways we've been able to do that in the past.

1. Run diag against the HBA and use the loopback plugs. At the end of
the diag routine the HBA is usually OK.

2. rmdev the device and then run cfgmgr. That usually wakes it up.

Then it's a reboot.

Good luck.

Harold E. Hass
Senior Network Systems Engineer
County of Fresno, IT Services Dept.

-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf Of
Paul Deveau
Sent: Thursday, July 12, 2007 6:45 AM
To: aix-l@xxxxxxxxxxxxx
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