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Adjusting Volume Capacities for Pairs
When you create a pair, the capacity of S-VOL must be the same as that of
P-VOL. To set a desired volume to a pair, you may need to adjust the capacity
of volume. This section describes the procedure to adjust the volume capacity.
When copying data from an external storage system (when you want to use an
external volume as P-VOL)
For "A", "B", and "C" in the following description, see Figure C-1.
To adjust the capacity of the USP V/VM volume to create a pair:
1. Map the external volume (A) as an internal volume (B) of the local storage
system. Make sure that the emulation type of the volume is OPEN-V.
2. Select the USP V/VM volume (C) which has the same capacity as the
mapped external volume (B), or which has the bigger capacity than the
mapped external volume (B). The emulation type of the volume (C) has to
be OPEN-V.
3. If you select the USP V/VM volume (C) which has the bigger capacity than
the mapped external volume (B), make the CV that has the same capacity
as the mapped external volume (B) out of the USP V/VM volume (C) using
the VLL function. For the VLL function, see the Virtual LVI/LUN and Volume
Shredder User's Guide.
Hitachi Universal Storage Platform V/VM Universal Volume Manager User's Guide
Adjusting Volume Capacities for Pairs
C
C-1
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