Migrating data between volumes by using SnapMirror

What SnapMirror does when migrating data

SnapMirror can migrate data between volumes and redirect NFS clients to the new volume without rebooting the storage system or remounting to volume on NFS clients. The migration must be run on two volumes which are currently the source volume and destination volume in a SnapMirror relationship. SnapMirror does the following once you start the migration process:

Performs a SnapMirror incremental transfer to the destination volume.
Stops NFS and CIFS services to the source volume.
Migrates NFS file handles to the destination volume.
Makes the source volume restricted.
Makes the destination volume read-write.

What SnapMirror does not do when migrating data

SnapMirror does not do the following:

Transfer IP addresses, license keys, or quota information. You must remount on the NFS clients unless one of the following is true:
- You transfer the IP address of the source system to the destination system independently after the migration.
- The source and destination volumes reside on the same system, in which case, the IP address to access either volume is the same.
Migrate CIFS clients. You must reestablish CIFS client sessions after migrating data to the destination volume.

Migrating data

To migrate data to another volume, complete the following step.

Step	Action
1	Enter the following command: snapmirror migrate [srcsystem:]srcvolume [dstsystem:]dstvolume srcsystem is the source system. srcvolume is the source volume. dstsystem is the destination system. dstvolume is the destination volume.