Workflow for storing Thin Image snapshot data

Snapshot data is data in the pool, which is replaced data. Use this workflow to replace data in the pool.

  1. You create a Thin Image pair. The pair is in "PAIR" status.

  1. The host updates the primary volume.

  1. You split the Thin Image pair. The snapshot data of the primary volume is stored (Snapshot data A in the figure below).

  1. The host updates the primary volume again.

  1. You split the Thin Image pair. The updated data in the primary volume is stored as snapshot data (Snapshot data B in the figure below). In the event of data corruption, you can recover using this snapshot data.

The following figure illustrates how data in the pool is replaced.

olh-note.gif The host references the P-VOL, which includes Snapshot data A and Snapshot data B. These snapshots are handled as Thin Image S-VOLs.