Snapshot tree components

A snapshot tree contains the following volumes.

Volume type	Volumes that can be used	Description
Root	Logical volume (LDEV)	Volume (L1 pair of the P-VOL) in the top layer of a snapshot tree. The logical volume of the P-VOL contains DP-VOLs (V-VOL of which provisioning type is Dynamic Provisioning).
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.

Volume type

Volumes that can be used

Description

Root

Logical volume (LDEV)

Volume (L1 pair of the P-VOL) in the top layer of a snapshot tree.

The logical volume of the P-VOL contains DP-VOLs (V-VOL of which provisioning type is Dynamic Provisioning).

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.