SAN Storage : How To Remove LUN

I did this on SLES11, but i think it can be applied on other distro also.

1. Unmap the LUN from the SAN controller.

2. To list down the current mapped LUN : multipath -ll

360050768028082bde800000000000008 dm-2 IBM,2145

size=70G features='1 queue_if_no_path' hwhandler='0' wp=rw

|-+- policy='round-robin 0' prio=0 status=active

| |- 1:0:0:1 sdc 8:32 failed faulty running

| `- 2:0:0:1 sdg 8:96 failed faulty running

`-+- policy='round-robin 0' prio=0 status=enabled

|- 1:0:1:1 sde 8:64 failed faulty running

`- 2:0:1:1 sdi 8:128 failed faulty running

3. multipath -f (LUN Id)

regdb02:~ # multipath -f 360050768028082bde800000000000008

4. clean up the scsi device record :

regdb02:~ # echo "1" > /sys/class/scsi_device/1\:0\:0\:1/device/delete

regdb02:~ # echo "1" > /sys/class/scsi_device/2\:0\:0\:1/device/delete

regdb02:~ # echo "1" > /sys/class/scsi_device/1\:0\:1\:1/device/delete

regdb02:~ # echo "1" > /sys/class/scsi_device/2\:0\:1\:1/device/delete

5. list down back the mapped LUN :

regdb02:~ # multipath -ll

regdb02:~

* empty already

5. rescan the bus

regdb02:~ # cd /usr/bin/

regdb02:/usr/bin # ./rescan-scsi-bus.sh

Done