[Linux-cluster]GFS Problem

Frank L. Setinsek fsetinsek at techniscanmedical.com
Wed May 18 17:36:39 UTC 2005

The storage is fronted by a switch, the SCSI errors occur after the
Queue_Full warning which seems to initiate the problem.  In this context,
what does Queue_Full mean? 

-----Original Message-----
From: linux-cluster-bounces at redhat.com
[mailto:linux-cluster-bounces at redhat.com] On Behalf Of Michael Conrad Tadpol
Sent: Wednesday, May 18, 2005 8:36 AM
To: linux clustering
Subject: Re: [Linux-cluster]GFS Problem

On Tue, May 17, 2005 at 11:39:08PM -0600, Frank L. Setinsek wrote:
>    Hardware Configuration:  Six node cluster, each node has a LSI Fibre
>    Host Adapter interface to a SAN.
>    Software Configuration: The kernel is 2.4.21-20.EL with GFS-6.0.2-25
>    Problem: While four nodes are simultaneously accessing the SAN, if a
>    node attempts to access the SAN, one of the nodes will kernel panic.
>                  The node that crashes seems to be random.  All the
>    have the same error as follows:
>    May 17 21:53:52 compute-0-2.local kernel: mptscsih: ioc0: WARNING -
>    (0:0:1) reported QUEUE_FULL!
>    May 17 21:53:52 compute-0-2.local kernel: SCSI disk error : host 0
channel 0
>    id 0 lun 1 return code = 440b0000

It really looks like your storage cannot have more than four nodes accessing
it at a single time.  You are getting scsi errors which are completely
confusing gfs, and causing it to panic.

Michael Conrad Tadpol Tilstra
To err is human, to really foul things up requires a computer.

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