[Discuss] Fibre Channel and CentOS 5 issues

[jay at lentecs.com (Jason Normand)]

Thanks Tony,  It does appear to be an issue with the default CentOS/RHEL
Brocade driver.  I was able to reverse engineer the installer for IBMs RHEL
version,  and it works fine once the OEM driver is in place.


On Tue, Mar 6, 2012 at 3:00 PM, Tony Koker <tkoker at gmail.com> wrote:

> Jason,
>
>    It sounds like a config/driver issue. If there was an arbitrated loop
> or hardware issue you would most likely not see LUNs at all.
>    Not any experience with CentOS, but this seems like issues we've had
> with Linux (RHEL and Solaris, even Windows) before.
>    Also haven't used Brocade HBA, but Emulex and QLogic. Still seems like
> config/driver though.
>
> with gratitude and in service,
> Tony Koker
> ~~~~~
>
>
> On Tue, Mar 6, 2012 at 1:19 PM, Jason Normand <jay at lentecs.com> wrote:
>
>> We are working on setting up some new hardware for our db servers, but I
>> am
>> having trouble getting the Fibre Channel LUN recognized by CentOS 5.7.  We
>> are running on an IBM x3550 with dual Brocade HBAs, and have them
>> connected
>> to an IBM DS3524 with dual controllers.  Each controller is direct
>> attached
>> to one HBA.  I am able to get Cent to see the LUN if i power cycle the
>> controllers, however it will not see it after a system reboot.  The HBAs
>> are recognized after reboot but rescanning the scsi bus does not help.
>>  Only a power cycle on the controllers or a reset of the LUN will get Cent
>> to recognize it.
>>
>> Now I have little experience with Fibre Channel and was looking for some
>> pointers in the right direction.  Does this sound like a hardware issue or
>> a Cent config/driver issue?
>>
>> Thanks
>> Jason
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>
>