HP 3PAR Ubuntu Operating System Implementation Guide

# echo "1" > /sys/class/scsi_host/<host instance>/device/<rport-host instance>/ <target
instance>/<device instance>/delete
For example:
# kpartx -d /dev/mapper/350002ac001b40031
# dmsetup remove 350002ac001b40031
# echo "1" > /sys/class/scsi_host/host0/device/target0\:0\:0/0\:0\:0\:0//delete
<target instance>/<device instance>/delete
NOTE: When using the echo command, make sure the devices are removed from each of the
host HBA instances.
Method 2
Issue the following commands:
# kpartx -d /dev/mapper/<device node>
# dmsetup remove <device node>
# echo "scsi remove-single-device X X X X " > /proc/scsi/scsi
where <h> is the HBA number, <c> is the channel on the HBA, <t> is the SCSI target ID, and
<l> is the LUN.
Example: Remove LUN 2
# multipath -ll
350002ac000160121 dm-3 3PARdata,VV
size=5.0G features='1 queue_if_no_path' hwhandler='0' wp=rw
`-+- policy='round-robin 0' prio=1 status=active
|- 0:0:0:2 sdb 8:16 active ready running
|- 0:0:1:2 sdk 8:160 active ready running
|- 1:0:0:2 sdt 65:48 active ready running
`- 1:0:1:2 sdac 65:192 active ready running
# kpartx -d /dev/mapper/350002ac000160121
# dmsetup remove 350002ac000160121
# echo "scsi remove-single-device 0 0 0 2" > /proc/scsi/scsi
# echo "scsi remove-single-device 0 0 1 2" > /proc/scsi/scsi
# echo "scsi remove-single-device 1 0 0 2" > /proc/scsi/scsi
# echo "scsi remove-single-device 1 0 1 2" > /proc/scsi/scsi
NOTE: When using the echo command, make sure the devices are removed from each of the
host HBA instances.
After removing the storage volume from the host using one of the two methods, remove the VLUN
from the HP 3PAR StoreServ Storage by issuing removevlun <VVname> <LUN> <host>.
# removevlun testvlun 0 ubuntuhost
32 Modifying HP 3PAR Devices on the Host Server