Example 23 Removing a path to a storage device in RHEL 5.x

#echo offline > /sys/block/sdd/device/state

#echo 1 > /sys/block/sdd/device/delete

#echo offline > /sys/block/sdc/device/state

#echo 1 > /sys/block/sdc/device/delete

#multipath -ll

mpath13 (360060160bf902a00e03cb1bb3c3fe411) dm-4 3PARdata,VV [size=150G][features=0][hwhandler=0][rw]

\_ round-robin 0 [prio=1][active]

\_ 2:0:1:2 sdj 8:144 [active][ready] \_ 3:0:1:2 sdm 8:192 [active][ready]

mpath12 (360060160bf902a00cae2a2a33c3fe411) dm-3 3PARdata,VV [size=200G][features=0][hwhandler=0][rw]

\_ round-robin 0 [prio=1][active]

\_ 2:0:1:1 sdi 8:128 [active][ready] \_ 3:0:1:1 sdl 8:176 [active][ready]

mpath11 (360060160bf902a002ac0388f3c3fe411) dm-2 3PARdata,VV [size=200G][features=0][hwhandler=0][rw]

\_ round-robin 0 [prio=1][active]

\_ 2:0:1:0 sdh 8:112 [active][ready] \_ 3:0:1:0 sdk 8:160 [active][ready]

#

13.Start the migration by using the HP 3PAR Online Import Utility startmigration command. Example 24 Starting migration by using startmigration

>startmigration -migrationid 1411673030253 >SUCCESS: Data transfer started successfully.

Viewing Migration Status

Viewing all Migrations

To view all migrations, use the showmigration command from the HP 3PAR Online Import Utility.

Viewing Migrations for a Selected Source Storage System

To view all migrations for a selected source EMC Storage system, use the showmigration command with the source option from the HP 3PAR Online Import Utility. All migrations for the storage system are displayed.

Viewing a Selected Migration

To view a selected migration, use the showmigration command with the migrationid option from the HP 3PAR Online Import Utility.

Viewing Selected Migration Progress by Volume

To view details for a selected migration by source storage system volume, use the showmigrationdetails command with the migrationid option from the HP 3PAR Online Import Utility.

50 Performing Online Data Migration Using Linux