Migtype online option | HP Online Import Software specification

IMPORTANT: In Linux, EMC PowerPath devices are presented as /dev/emcpower* (for example, /dev/emcpowera). EMC PowerPath removal in Linux also removes this device type. This changes when the Linux native device-mapper multipath assumes management of these devices. For example, before EMC PowerPath removal, consider combining /dev/sdb and /dev/sdc into /dev/emcpowera. After EMC PowerPath removal, /dev/sdb and /dev/sdc would be represented by /dev/mpathx. This represents a challenge for customers who use direct device referencing in /etc/fstab or other custom scripts. HP generally recommends that fstab mounts be performed using blkid/uuid; however, this is not always employed. In that case, consider mounting /dev/emcpowera as /var. After EMC PowerPath removal, /var would not automatically mount to /dev/mpathx.

c.If this is for a cluster configuration, initialize the cluster and start cluster services.

d.Start applications.

8.Using the HP 3PAR Online Import Utility, execute the createmigration command with the

-migtype online option.

Example 10 Using createmigration with -migtype online

>createmigration -sourceuid xxxxxxxxxxxxxxxx -srchost "X7DBU-02-IG" -destcpg "testcpg" -destprov full -migtype online

>SUCCESS: Migration job submitted successfully. Please check status/details using showmigration command. Migration id: 1411673030253

This step admits LUNs presented to the EMC Storage system and exports them to the HP 3PAR host created on the EMC Storage system.

NOTE: Be aware, the createmigration command may take several minutes to complete.

TIP: Make a note of the Migration ID as it will be used in commands to track migration progress.

9.Execute the showmigration command to verify that the data migration task preparation has completed successfully. This may take some time. On the successful creation of the task the STATUS column will indicate preparationcomplete(100%).

>showmigration
MIGRATIONID		TYPE	SOURCE_NAME
DESTINATION_NAME		START_TIME
	END_TIME		STATUS(PROGRESS)(MESSAGE)
1411673030253		online	SYMMETRIX+000194901212
3par_7200_DCA_01		Thu Sep 25	15:
23:50 EDT 2014	-NA-		preparationcomplete(100%)(-NA-)

10.Execute the showmigrationdetails command to verify the volumes being migrated. In the preparation stage, PROGRESS for each volume will be 0% and the TASK_ID will be unknown.

>showmigrationdetails -migrationid 1411673030253

SOURCE_VOLUME	DESTINATION_VOLUME	TASK_ID	PROGRESS
Volume 00145	Volume_00145	unknown	0%
Volume 00146	Volume_00146	unknown	0%
>

42 Performing Online Data Migration Using Linux