[Linux-cluster] Cluster Failover Failed

Wed Jun 15 12:54:47 UTC 2011

Hi Alvaro,

I have also opened a ticket with RedHat for the same reasons on rhel5u6 and a DS5020 and a DS3524 which I believe they are both active/active and multipath seems to treat them as active/passive, but I guess this is for another mailing list.

Raúl

From: linux-cluster-bounces at redhat.com [mailto:linux-cluster-bounces at redhat.com] On Behalf Of Alvaro Jose Fernandez
Sent: Wednesday, June 15, 2011 1:15 PM
To: linux clustering
Subject: Re: [Linux-cluster] Cluster Failover Failed

Hi,

DOC-35489 only partionally approaches the problem. I have it too, on a passive/active IBM DS4000 array and RHEL5.5. I've excluded from lvm.conf any SAN partitions as per the note (and also made a new initrd boot, as lvm.conf is included at boot time as the / partition I have it LVM'ed) , but messages still apears on bootup. They always dissapear when multipathd service starts and its scsi_dh_rdac discipline is loaded.

Even opened a case with Redhat, and obtained the same response (but not workaround): "it's entirely harmless, they are normal".

Alvaro

________________________________
De: linux-cluster-bounces at redhat.com [mailto:linux-cluster-bounces at redhat.com] En nombre de Martinez-Sanchez, Raul
Enviado el: miércoles, 15 de junio de 2011 13:11
Para: 'Linux-cluster at redhat.com'
Asunto: Re: [Linux-cluster] Cluster Failover Failed

Hi Balaji,

According to RedHat documentation some Storage Array Devices configured in active/passive mode and using multipath will display this I/O error messages, so this might also be your case (see https://access.redhat.com/kb/docs/DOC-35489), this link indicates that the messages are harmless and can be avoided following its instructions.

The logs you sent do not indicate anything related to fencing, so you might need to send the relevant info for that.

Cheers,

Raúl

From: linux-cluster-bounces at redhat.com [mailto:linux-cluster-bounces at redhat.com] On Behalf Of Balaji S
Sent: Tuesday, June 14, 2011 7:46 PM
To: Linux-cluster at redhat.com
Subject: [Linux-cluster] Cluster Failover Failed

Hi,
In my setup implemented 10 tow node cluster's which running mysql as cluster service, ipmi card as fencing device.

In my /var/log/messages i am keep getting the errors like below,

Jun 14 12:50:48 hostname kernel: end_request: I/O error, dev sdm, sector 0
Jun 14 12:50:48 hostname kernel: sd 3:0:2:2: Device not ready: <6>: Current: sense key: Not Ready
Jun 14 12:50:48 hostname kernel:     Add. Sense: Logical unit not ready, manual intervention required
Jun 14 12:50:48 hostname kernel:
Jun 14 12:50:48 hostname kernel: end_request: I/O error, dev sdn, sector 0
Jun 14 12:50:48 hostname kernel: sd 3:0:2:4: Device not ready: <6>: Current: sense key: Not Ready
Jun 14 12:50:48 hostname kernel:     Add. Sense: Logical unit not ready, manual intervention required
Jun 14 12:50:48 hostname kernel:
Jun 14 12:50:48 hostname kernel: end_request: I/O error, dev sdp, sector 0
Jun 14 12:51:10 hostname kernel: sd 3:0:0:1: Device not ready: <6>: Current: sense key: Not Ready
Jun 14 12:51:10 hostname kernel:     Add. Sense: Logical unit not ready, manual intervention required
Jun 14 12:51:10 hostname kernel:
Jun 14 12:51:10 hostname kernel: end_request: I/O error, dev sdc, sector 0
Jun 14 12:51:10 hostname kernel: printk: 3 messages suppressed.
Jun 14 12:51:10 hostname kernel: Buffer I/O error on device sdc, logical block 0
Jun 14 12:51:10 hostname kernel: sd 3:0:0:2: Device not ready: <6>: Current: sense key: Not Ready
Jun 14 12:51:10 hostname kernel:     Add. Sense: Logical unit not ready, manual intervention required
Jun 14 12:51:10 hostname kernel:
Jun 14 12:51:10 hostname kernel: end_request: I/O error, dev sdd, sector 0
Jun 14 12:51:10 hostname kernel: Buffer I/O error on device sdd, logical block 0
Jun 14 12:51:10 hostname kernel: sd 3:0:0:4: Device not ready: <6>: Current: sense key: Not Ready
Jun 14 12:51:10 hostname kernel:     Add. Sense: Logical unit not ready, manual intervention required

when i am checking the multipath -ll , this all devices are in passive path.

Environment :

RHEL 5.4 & EMC SAN

Please suggest how to overcome this issue. Support will be highly helpful.
Thanks in Advance

--
Thanks,
BSK

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