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Splitting pairs with csuspend and pprcopy suspend, Splitting pairs – HP XP Racks User Manual

Page 94

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Description

Value

Parameters

UNITADDRESS = ccuu = device number.

name of the JCL statement which identifies the
volume.

You must use these parameters to successfully
run the command.

Primary volume: SSID, serial number, channel
connection address.

PRI

To request an Add and Split, set MSF00
instead of a serial number.

Note: This parameter is valid for MODE(COPY)
or MODE(NOCOPY) only.

To assign a pair to a CG, set MAnn0 instead of
a serial number.

Note: nn is a CTG ID.

NA

Secondary volume: SSID, serial number, channel
connection address.

SEC

The system recognizes only COPY for the
MODE parameter, even if NOCOPY is
specified.

COPY

MODE

NOCOPY

Copy speed is medium, regardless what is
specified for the PACE parameter.

1-255

PACE

Not used by BC Z.

Not applicable

CRIT

To prevent the command from ending
abnormally (reporting CC = 12), do not specify
this parameter if MODE(RESYNC) is set.

YES

MSGREQ

MSGREQ function is not applicable.

NO

NA

P-VOL or S-VOL CU number.

LSS

The pair is created whether the S-VOL is online
or not.

YES

ONLINSEC*

If the S-VOL is online, the pair is not created.

NO

* Not specifying and specifying NO for this parameter has the same effect.

The following image shows an example of the PPRCOPY ESTPAIR PPRCOPY command:

Splitting pairs with CSUSPEND and PPRCOPY SUSPEND

The P-VOL and its associated S-VOLs for pairs in “DUPLEX” status are typically not identical since
update copy operations are asynchronous.
Splitting the pair allows the host access to the S-VOL. If the pair is not split (“Split/SUSPOP” status),
the host can access the non-reserved S-VOL. You cannot access reserved volumes that are unpaired.
Prerequisite: The volumes must be paired or you have performed Quick Resync on the pair (“DUPLEX”
status).

94

Business Copy Z pair user tasks using IBM PPRC

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