We recommend that you prepare snapshots for block-level data transfer. Ensure that each volume group has sufficient free space for snapshots (at least 10% of the sum of all partitions). If snapshots are not available, PlateSpin Migrate locks and releases each block in turn on the source workload for data transfer.
The blkwatch driver leverages LVM snapshots if they are available. Copying blocks from the snapshot helps avoid potential open file conflicts.
For LVM storage, see Knowledgebase Article 7005872.