Chapter 10. Volume mirroring and migration 449
Volume migration using Move to Another Pool: This option allows any volume to be
moved between storage pools without interruption to host access. It is effectively a quicker
version of clicking Volume Mirroring Addvdiskcopy. You might use this option if you
want to move volumes in a single step or do not already have a volume mirror copy. Note
that when using Move to Another Pool option, it moves each single extent of volume from
a Storage Pool to another; with the Volume Mirror Addvdiskcopy option, you always have
another copy of data. With the Move to Another Pool option, the migrate process cannot
be stopped and you must wait until the process finishes.
Migrating from external storage using Image mode: This option allows you to migrate data
from an already existing volume or LUN on another external storage subsystem into IBM
Flex System V7000 Storage Node as an image mode mdisk. With this function, the
volume can then be mirrored as a second copy to another already existing generic, striped
volume storage pool creating a copy without putting any metadata on the original device
(Image mode mdisk); therefore, leaving the source data intact. After they are migrated in,
they are fully accessible as volumes for use by the host and any of the other features of
IBM Flex System V7000 Storage Node.
Migration methods: When planning for use of the migration methods listed previously,
you will need to take a brief outage to install the host drivers for IBM Flex System V7000
Storage Node. For release 7.1 and later, this information is now consolidated into the IBM
System Storage SAN Volume Controller Information Center at this website:
http://publib.boulder.ibm.com/infocenter/svc/ic/index.jsp
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