RHEL: Remove existing SAN LUNs -

RHEL: Remove existing SAN LUNs

# Tested on RHEL 5 & 6

# Given following LUN, for instance:

multipath -ll
[...]
   3600508b4000971cd0001000022fa0000 dm-0 HP,HSV210
   [size=2.0G][features=0][hwhandler=0][rw]
   \_ round-robin 0 [prio=0][active]
    \_ 1:0:0:3 sdc        8:32   [active][undef]
    \_ 1:0:2:3 sdk        8:160 [active][undef]
    \_ 2:0:0:3 sds        65:32 [active][undef]
    \_ 2:0:1:3 sdw        65:96 [active][undef]
   \_ round-robin 0 [prio=0][enabled]
    \_ 2:0:2:3 sdaa       65:160 [active][undef]
    \_ 2:0:3:3 sdae       65:224 [active][undef]
    \_ 1:0:1:3 sdg        8:96   [active][undef]
    \_ 1:0:3:3 sdo        8:224 [active][undef]

# Run following commands to remove it from the system:

multipath -f 3600508b4000971cd0001000022fa0000
echo 1>/sys/block/sdc/device/delete
echo 1>/sys/block/sdk/device/delete
echo 1>/sys/block/sds/device/delete
echo 1>/sys/block/sdw/device/delete
echo 1>/sys/block/sdaa/device/delete
echo 1>/sys/block/sdae/device/delete
echo 1>/sys/block/sdg/device/delete
echo 1>/sys/block/sdo/device/delete

# Take care of not running any HBA rescan before definitively detaching LUNs from server.