A snapshot tree contains the following volumes.
| Volume type | Volumes that can be used | Description |
|---|---|---|
| Root |
|
Volume (P-VOL in an L1 pair) in the top layer of a snapshot tree. |
| Node | DP-VOL |
Volumes located between the root volume and leaf volumes. S-VOL of the root volume (or another node volume), and the P-VOL of a leaf volume (or another node volume). |
| Leaf | DP-VOL |
Volumes in the bottom layer of a snapshot tree. S-VOL of the root volume or a node volume, which is not a P-VOL of any pair. |