Avoiding data corruption or loss

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Perform the steps in this procedure to avoid losing or corrupting data.

Procedure

  1. Stop the I/O operation to the mounted iSCSI device.
  2. Unmount the mounted iSCSI device using the umount utility. 
    #umount /dev/sda1
    Note: If you try to unmount the iSCSI device while I/O is still running, the unmount command fails with device is busy.
  3. Log out from the target:
    #iscsiadm --mode node --target <IQN> --portal 192.0.2.* --logout
    Note: If you log out from the target while the iSCSI device is mounted and I/O is running, it causes data corruption or loss. So execute step 1 and step 2 of this procedure before you run step 3.