kernel: Buffer I/O errors in /var/log/messages.

Solution Verified - Updated -

Issue

  • Getting Buffer I/0 errors on unused EMC san luns:

  • I/O error is triggerting in the logs, as shown below:

kernel: Buffer I/O error on device sdb, logical block 0
kernel: Buffer I/O error on device sdc, logical block 0
kernel: Buffer I/O error on device sdd, logical block 0
kernel: Buffer I/O error on device sdf, logical block 6553631

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

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