Hitachi VSP G1000 User Manual page 23

maximum of 64 layers can be created, and a maximum of 1,024 S-VOLs can
be used for a P-VOL. In this case, the snapshot tree is cascaded.
L2 to L64 pairs are called cascaded pairs. The following figure illustrates the
configuration of cascaded snapshot trees.
• The volume in the top layer of the snapshot tree (P-VOL of the L1 pair) is
the root volume.
• Volumes between the root and leaf volumes are node volumes.
• Volumes in the bottom layer of the snapshot tree are leaf volumes.
To create a Thin Image pair that can be used in a cascaded snapshot tree,
open the Create TI Pairs window and select Enable for Cascade. For details,
Overview of Thin Image 23
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series