How do I stop receiving I/O errors from LUNZ luns on Red Hat Enterprise Linux systems with EMC Clariion SAN's attached?
Issue
- Cluster nodes show IO errors on lun that is no longer attached to server these error messages show up everyday at the same time.
kernel: end_request: I/O error, dev sda, sector 0 kernel: end_request: I/O error, dev sda, sector 2097144 kernel: end_request: I/O error, dev sdy, sector 0 kernel: end_request: I/O error, dev sdy, sector 2097144 kernel: end_request: I/O error, dev sdak, sector 0 kernel: end_request: I/O error, dev sdak, sector 2097144 kernel: end_request: I/O error, dev sdm, sector 0 kernel: end_request: I/O error, dev sdm, sector 2097144 - Errors occur when Red Hat Cluster Suite service qdiskd starts:
kernel: end_request: I/O error, dev sda, sector 0 kernel: end_request: I/O error, dev sdak, sector 0 kernel: end_request: I/O error, dev sdm, sector 0 kernel: end_request: I/O error, dev sdy, sector 0 qdiskd[6995]: <warning> 5 matches found for label 'qdisk1'; please use 'device=' instead! qdiskd[6995]: <info> Quorum Partition: /dev/emcpowerk1 Label: qdisk1 qdiskd[6996]: <info> Quorum Daemon Initializing qdiskd[6996]: <info> Heuristic: '/bin/ping -c1 -w1 135.9.9.254' UP - Kernel is logging in I/O errors on LUNZ disks that are automatically assigned when EMC clarion luns are assigned. Is there any way we can mask these LUNZ luns so kernel won't see them and log I/O errors ?
Environment
- Red Hat Enteprise Linux 5
- EMC Clariion SAN
- LUNZ LUNs presented and visable in /proc/scsi/scsi
Host: scsi0 Channel: 00 Id: 00 Lun: 00 Vendor: DGC Model: LUNZ Rev: 0429 Type: Direct-Access ANSI SCSI revision: 04
- LUNZ LUNs presented and visable in /proc/scsi/scsi
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.
