Red Hat Enterprise Linux hangs or files are not accessible, error in logs is 'rejecting I/O to offline device'

Solution Verified - Updated -


  • The system hung, or file systems are no longer accessible.
  • Unable to write to one or more filesystems.
  • Server appears to have spontaneously rebooted
  • The console and /var/log/messages logs show messages like:

    scsi4 (0:0): rejecting I/O to offline device
    [ ... ]
    sd 1:0:0:5: [sdf] Warning! Received an indication that the LUN assignments on this target have changed. The Linux SCSI layer does not automatically remap LUN assignments.
    [ ... ]
    sd 1:0:0:2: rejecting I/O to offline device
    [ ... ]
    sd 1:0:0:4: Device offlined - not ready after error recovery
    [ ... ]
    EXT3-fs (server): I/O error while writing superblock
    [ ... ]
    JBD: Spotted dirty metadata buffer (dev = server, blocknr = 0). There's a risk of filesystem corruption in case of system crash.


  • Red Hat Enterprise Linux

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