Explanation: ALLOWPPRCP is an optional
parameter that specifies whether a Metro Mirror primary volume is
allowed to become a target of a FlashCopy® operation, and whether a preserve mirror operation is required,
preferred, or not desired when the target volume is a Metro Mirror
primary volume during fast replication recovery. When you specify
ALLOWPPRCP, you must specify one of the following options:
- NO
- Specifies that a Metro Mirror primary volume is not to become
a FlashCopy target. This
is the default.
- PRESERVEMIRRORNO
- YES
- Specifies that a Metro Mirror primary volume is allowed to become
a FlashCopy target, and
the FlashCopy is to be
performed without considering a preserve mirror operation. If the
target volume is not a Metro Mirror primary volume, this parameter
has no effect.
- PRESERVEMIRRORPREFERRED
- Specifies that a Metro Mirror primary volume is allowed to become
a FlashCopy target and
it would be preferable that the Metro Mirror pair does not go into
a duplex pending state as a result of the FlashCopy operation when the target volume is a
Metro Mirror primary volume. If the preserve mirror operation cannot
be accomplished, the FlashCopy operation
is still to be attempted. If the intended FlashCopy target volume is not a Metro Mirror primary
volume, this parameter has no effect.
- PRESERVEMIRRORREQUIRED
- Specifies that a Metro Mirror primary volume is allowed to become
a FlashCopy target, and
the Metro Mirror pair must not go into a duplex pending state as a
result of the FlashCopy operation
when the target volume is a Metro Mirror primary volume. If the preserve
mirror operation cannot be accomplished, the FlashCopy should not be attempted. If the target
volume is not a Metro Mirror primary volume, this parameter has no
effect.
Note: - ALLOWPPRCP overrides the stored preserve mirror indicator for
the copy pool. The change is not persistent and applies to one invocation
of the FRRECOV command only.
- ALLOWPPRCP is ignored when recovering from a tape.
- The combined use of fast reverse restore and the preserve mirror
operation is not supported. When a copy pool is defined allowing fast
reverse restore, and the ALLOWPPRCP(PMREQ) or ALLOWPPRCP(PMPREF) parameter
is specified, the FRRECOV command is failed.
- ALLOWPPRCP options PRESERVEMIRRORREQUIRED, PRESERVEMIRRORPREFERRED,
PRESERVEMIRRORNO, and YES cannot be specified in combination with
the FASTREPLICATION option of NONE for data set recoveries.
Defaults: If you do not specify ALLOWPPRCP
on the FRRECOV command, DFSMShsm uses the currently stored preserve
mirror indicator for the copy pool. If no preserve mirror indicator
has been set for the copy pool, the default is NO.
Related reading: For more information about IBM® Remote Pair FlashCopy, Metro Mirror, also
known as synchronous Peer-to-Peer Remote Copy (PPRC), and other copy
services functions, see z/OS DFSMS Advanced Copy Services.