[Linux-cluster] SAN + multipathd + GFS : SCSI error

[tameikareed]

Have you tried moving the data to another lun and deleting the lun with 
errors and recreating that lun? I know that involves downtime unless you 
have some type of failover implemented.

berthiaume_wayne at emc.com wrote:
> These are DID_BUS_BUSY errors being reported by the QLogic driver. I
> would check your SAN for congestion, increase the cache in the EVA, or
> change the queue depth in your qla2xxx driver.
>
> Regards,
> Wayne. 
>
> -----Original Message-----
> From: linux-cluster-bounces at redhat.com
> [mailto:linux-cluster-bounces at redhat.com] On Behalf Of FM
> Sent: Friday, August 10, 2007 9:58 AM
> To: Redhat Cluster
> Subject: [Linux-cluster] SAN + multipathd + GFS : SCSI error 
>
> Hello,
> All servers are RHEL 4.5
> SAN is HP EVA 4000
> we are using linux qla modules and multipathd
> cluster server have only one FC Card
>
>
> In the dmesg of servers connected to GFS we have a lot of :
> SCSI error : <0 0 1 1> return code = 0x20000
> end_request: I/O error, dev sdd, sector 37807111
>
> The cluster seems to work fine but I'd like to know if we can avoid this
> error.
>
> here is a multipathd -ll output :
>
> [root at como ~]# multipath -ll
> mpath1 (3600508b4001051e40000900000310000)
> [size=500 GB][features="1 queue_if_no_path"][hwhandler="0"]
> \_ round-robin 0 [prio=50][active]
>  \_ 0:0:0:1 sda 8:0  [active][ready]
> \_ round-robin 0 [prio=10][enabled]
>  \_ 0:0:1:1 sdd 8:48 [active][ready]
>
> mpath3 (3600508b4001051e400009000009e0000)
> [size=150 GB][features="1 queue_if_no_path"][hwhandler="0"]
> \_ round-robin 0 [prio=50][active]
>  \_ 0:0:1:2 sde 8:64 [active][ready]
> \_ round-robin 0 [prio=10][enabled]
>  \_ 0:0:0:2 sdb 8:16 [active][ready]
>
>
>
> and the device in the multipath.conf
>
> devices {
>         device {
>                 vendor                  "HP "
>                 product                 "HSV200 "
>                 path_grouping_policy    group_by_prio
>                 getuid_callout          "/sbin/scsi_id -g -u -s
> /block/%n"
>                 path_checker            tur
>                 path_selector           "round-robin 0"
>                 prio_callout            "/sbin/mpath_prio_alua %d"
>                 failback                immediate
>                 no_path_retry           60
>         }
> }
>
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