User's Guide

Example 14 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]
#
15. Start the migration by using the HP 3PAR Online Import Utility startmigration command.
Example 15 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.
Online Data Migration with Native device-mapper Multipath
To perform online data migration using RHEL 5.x or RHEL 6.x, follow these steps.
1. Zone the source array to the destination array.
2. Using the HP 3PAR Online Import Utility addsource command, add the source storage system
Online Data Migration with Native device-mapper Multipath 45