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 Storage   /   Snapshots   /   Concepts   /  How snapshot images are used   /  Snapshot volumes
  
Snapshot volumes
You can create a snapshot volume and assign it to a host if you want to read or write snapshot data. The snapshot volume shares the same characteristics as the base volume (RAID level, I/O characteristics, and so on).
When you create a snapshot volume, you can designate it as read-only or read-write accessible.
When you create read-only snapshot volumes, you do not need to add reserved capacity. When you create read-write snapshot volumes, you must add reserved capacity to provide write-access.
1   Base volume.
2   Host.
3   Read-only snapshot volume.
4   Read-write snapshot volume.
5   Reserved capacity.