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: [email protected] [mailto:[email protected]] On Behalf Of Balaji S Sent: Tuesday, June 14, 2011 7:46 PM To: [email protected] 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 ________________________________ ************************************************************************************** This message is confidential and intended only for the addressee. If you have received this message in error, please immediately notify the [email protected] and delete it from your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for employment and security purposes. To protect the environment please do not print this e-mail unless necessary. NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603 8808 40-00 **************************************************************************************
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