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Delete multipath device

  • Check the fstab for the devices that has to be removed.
  • Be sure to unmount them!
  • Check that you have uncommented or removed all ref. in /etc/fstab to the SAN LUN (Volume Group / Logical Volume)
  • If LVM is used:

a. Remove the logical volumes


b. Remove the volume groups


c. Remove the physical volumes

  • Remove each path to the device from the SCSI subsystem. To do so, use the command echo 1 > /sys/block/device-name/device/delete where device-name may be sde, for example.

(Another variation of this operation is echo 1 > /sys/class/scsi_device/h:c:t:l/device/delete, where h is the HBA number, c is the channel on the HBA, t is the SCSI target ID, and l is the LUN)

a. Do this for every device name in the mpath that has to be removed:

b. Run multipath –ll to see the devices Eg. :

echo 1 > /sys/block/sdck/device/delete
echo 1 > /sys/block/sdcw/device/delete
echo 1 > /sys/block/sdi/device/delete
echo 1 > /sys/block/sdu/device/delete
echo 1 > /sys/block/sdce/device/delete
echo 1 > /sys/block/sdcq/device/delete
echo 1 > /sys/block/sdc/device/delete
echo 1 > /sys/block/sdo/device/delete

* If the device uses multipathing, run multipath -l and note all the paths to the device. 

NB! Note the wwn before you delete the multipath!

  • Remove the multipathed device using multipath -f device.
multipath –f mpath0
  • Ask SAN guys to remove the LUN(s).
  • Reboot and follow startup from ILO

Thanks to Mikkel Arnberg for the input to this article.


multipath_handling.txt · Last modified: 2012/10/11 08:56 by root