HP XP RAID Manager Software - Manual (Page 8)

The following figure shows how the V-VOL maintains the point-in-time data when you split the pair.
The following figure shows how the V-VOL maintains the point-in-time data when you split the pair.
The following image shows how the V-VOL maintains point-in-time data when you split the pair.
Data pools
When you replace data in the P-VOL, the data pool holds the data. After you split a pair, the
V-VOL maintains pointers to point-in-time data. If updates are written to the P-VOL before you update
the block, the data that is being replaced is first copied to the data pool. The V-VOL pointer to this
block is updated to the new address in the data pool. All pairs sharing the same P-VOL use a data
pool.
8 Overview of Business Copy/Snapshot