TrueCopy can be used to move data from one volume to another.
You do not need to use host migration software for data migration when using TrueCopy. Also, TrueCopy data migration does not affect the host.
In a data migration, the entire contents of a volume are copied to the secondary volume (P-VOL to S-VOL). The volumes are identical when the copy operation completes. The volumes are then usually released from the TrueCopy pair.
If you need to migrate data from other vendors' storage system, contact customer support.