HP XP P9500 Storage - Manual (Page 55)

2. Specify the JCL statement in the DDNAME parameter or specify the S-VOL device number in
the UNITADDRESS parameter.
3. Specify the CU number, LDEV number, and device number of the T-VOL for the TARGETVOL
parameter.
4. Specify YES for the CHANOERECORDINO parameter and execute the FLASHCPY ESTABLISH
command (Incremental FlashCopy), for example:
FLASHCPY ESTABLISH UNIT(X'7000')
TARGETVOL(X'00',X'01',7001) CHANOERECORDINO(YES)
The pair will be created.
5. Specify the RESTORE parameter and execute the FLASHCPY ESTABLISH command, for
example:
FLASHCPY ESTABLISH UNIT(X'7000') TARGETVOL(X'00',X'01',7001) RESTORE
When the S-VOL is updated, only the data of the updated part of the S-VOL (differential data) will
be copied to the T-VOL. When the T-VOL is updated, only the data of the updated part of the T-VOL
will be copied from the S-VOL.
Set the CHANOERECORDINO parameter to YES to maintain the relationship after the copying
process is completed and to manage the differential data between the S-VOL and the T-VOL. If
CHANOERECORDINO parameter is not specified, the relationship will be deleted after the copying
process is completed.
Using ANTRQST macro to establish Compatible FlashCopy relationships by volumes
The following table shows the parameters that you can use with the ANTRQST command when you
establish Compatible FlashCopy relationships by volumes:
Table 27 ANTRQST macro command parameters (REQUEST=FCESTABLISH)
Description Value Parameter
Specifies the device number (device address) of the S-VOL on which you
want to perform the FCESTABLISH command. Source device number SDEVN
Specifies the device number (device address) of the T-VOL on which you
want to perform the FCESTABLISH command. Target device number TDEVN
Establishes a relationship including all the tracks in the volume. If you
specify YES for this parameter and COPY for the MODE parameter, the YES INCREMENTAL
relationship will be maintained even after background copying completes,
and the differential data between the S-VOL and the T-VOL will be
managed. As long as the relationship is maintained, you cannot update
the T-VOL.
The differential data between the S-VOL and the T-VOL will be copied
when you execute the ANTRQST command with INCREMENTAL
parameter specified.
The relationship will be deleted after background copying completes. NO
NO is the default setting.
The relationship remains in effect after background copying completes.
Data can be written to the T-VOL. Subsequent changes are tracked so YTW
that future operations are performed incrementally. This relationship
continues until explicitly terminated with a Withdraw request.
Note: The target is writable while the incremental relationship is active.
Any writes done to the target during this period are overwritten if a
subsequent increment is done, keeping the target a true copy of the
source. If the relationship is reversed, the changes made to the target are
reflected on the source.
Establishing relationships by volumes for Compatible FlashCopy 55