Bug#700444: multipath-tools: Automatic path recovery not occurring on IBM Power with dual VIOS served disks.

[Ritesh Raj Sarraf]

On Sunday 10 March 2013 07:21 PM, Frank Fegert wrote:
> ststnagios02:~# dmesg | tail
> [6835466.341578] sd 0:0:1:0: [sda] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
> [6835466.341592] end_request: I/O error, dev sda, sector 0
> [6835467.341974] sd 1:0:1:0: [sdb] Unhandled error code
> [6835467.341983] sd 1:0:1:0: [sdb]  Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
> [6835467.341990] sd 1:0:1:0: [sdb] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
> [6835467.342003] end_request: I/O error, dev sdb, sector 0
> [6835471.342506] sd 0:0:1:0: [sda] Unhandled error code
> [6835471.342516] sd 0:0:1:0: [sda]  Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
> [6835471.342523] sd 0:0:1:0: [sda] CDB: Read(10): 28 00 00 00 00 00 00 00 08 00
> [6835471.342536] end_request: I/O error, dev sda, sector 0
>
> ststnagios02:~# /sbin/scsiinfo -l
> /dev/sda /dev/sdb
>
> ststnagios02:~# /sbin/scsiinfo -i /dev/sda
> INQUIRY command status  = 1
>
> ststnagios02:~# /sbin/scsiinfo -i /dev/sdb
> INQUIRY command status  = 1
>
> The Debian system is currently still in the "floating" state, so if
> there's any other test you'd like me to run, that'd be no problem.
> All other AIX systems on the test hardware sucessfully recovered their
> paths though.


That means multipath is reporting the correct status. The scsi devices
never recovered.
What is the device driver (and HBA) that is under use? Is it supported
under Debian?
I see you are on 2.6.39. Have you tried with a newer kernel?

You should also check if rescanning the SCSI bus changes any state. Use
rescan-scsi-bus.

-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."


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