3PAR InForm® OS 2.3.1 Concepts Guide (320-200112 Rev B, February 2010)

10.8
Virtual Copy Snapshots
3PAR InForm OS Concepts Guide InForm OS Version 2.3.1
only create read-only copies of a base volume. See Figure 10-1 for an example of alternating
read-only and read/write virtual copy relationships.
Figure 10-1. Alternating Read-only and Read/Write Virtual Copies
See Figure 10-2 for a more complex example of the possible relationships between a parent
base volume and its virtual copies.
Figure 10-2. Base Volume and Virtual Copy Relationships
RW=read/write
RO=read-only
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BASE VOLUME (RW)
RW = read/write
RO = read-only
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