Why File system went into read only mode ?

Solution Verified - Updated -

Issue

  • Filesystem getting read only due to hardware unavailability/inaccessibility.
Jul  7 21:27:45 server kernel: sd 1:0:0:0: scsi: Device offlined - not ready after error recovery 
Jul  7 21:27:45 server kernel: last message repeated 3 times
Jul  7 21:27:45 server kernel: sd 1:0:1:0: scsi: Device offlined - not ready after error recovery
Jul  7 21:27:46 server kernel: message repeated 12 times
Jul  7 21:27:46 server kernel: sd 1:0:0:0: rejecting I/O to offline device
Jul  7 21:27:46 server kernel: sd 1:0:0:0: rejecting I/O to offline device
Jul  7 21:27:46 server kernel: Buffer I/O error on device dm-14, logical block 39937
Jul  7 21:27:46 server kernel: lost page write due to I/O error on dm-14
Jul  7 21:27:46 server kernel: sd 1:0:0:0: rejecting I/O to offline device
Jul  7 21:27:46 server kernel: last message repeated 2 times
Jul  7 21:27:46 server kernel: sd 1:0:1:0: rejecting I/O to offline device

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Ext 2/3/4 filesystem

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