The
following conditions must be met before
a P/DAS operation is initiated:
The source volume for the P/DAS operation must meet the following
conditions:
Must be the primary volume of an active PPRC
pair.
Must be online to the system.
Must not
be part of an active XRC session.
Must not have any active
paging data sets in use.
Must not have outstanding reserves
(cancel any jobs that have
outstanding reserves prior to issuing P/DAS commands).
The secondary volume for the P/DAS operation must meet the following
conditions:
Must also be the secondary volume of the PPRC pair.
Must
not have any outstanding target device allocations to it,
such as ICKDSF or application programs.
The PPRC
pair must meet the following conditions:
The pair must be in duplex mode, which ensures that both the
source
and target devices are identical in data content.
The pair
must be of the same device type, but not necessarily
the same model.
Both volumes must either have the same capacity,
or the capacity
of the target volume must be greater than that of the source volume.
The pair must not
be in a CGROUP FREEZE state when you initiate
P/DAS.
Note: Following the P/DAS switch operation, the additional
capacity of the target volume will not be realized until you run a
subsequent ICKDSF job against the target volume to rebuild the VTOC.
Neither the SVC dump nor the ICKDSF processes can be active during
P/DAS operations.