Hitachi ShadowImage for z/OS user guide (HIT9503-96007, October 2007)

164 ShadowImage for the XP1024/XP128/XP12000/XP10000/SVS 200
NOTE: When you use the TGTUCB subparameter, it is necessary to apply APAR OA18914.
Cautions Switching Off the Power Supply Using Compatible Mirroring for IBM FlashCopy Ver. 2
The following explains what happens if you power off the disk array during FlashCopy Mirror Version 2
operations and later power on the disk array. What happens depends on the status of the shared memory
when powering on the disk array:
• If data on the shared memory is not volatilized and not lost:
The status before powering off will be maintained. As for the relationships in COPY mode, background
copying will automatically restart when you power on the disk array.
• If data on the shared memory is volatilized and lost:
If relationships exist before powering off the disk array, the T-VOLs will become blocked and
inaccessible from hosts when you power on the disk array. Thus, the host does not access the
inconsistent data in the T-VOLs. To restore the T-VOLs to normal status, force restoration of LDEVs.
NOTE: If the T-VOL is an external volume, the disk subsystem may start normally and the T-VOL may not
become blocked even if data on the shared memory is lost. However, although the disk subsystem starts
normally, it is feared that data in the T-VOL is not normal. Therefore, you should delete data in the T-VOL or
initialize the T-VOL.
• First complete the processing of At-Time Split function, and then switch off the power supply.
REQUEST=FCWITHDRAW TGTLSS LSS Specifies the LSS of the T-VOL on which you want to
perform the FCWITHDRAW command.
Use this subparameter when the TGTUCB
subparameter is NO.
TGTDVC CCA Specifies the CCA of the T-VOL on which you want to
perform the FCWITHDRAW command.
Use this subparameter when the TGTUCB
subparameter is NO.
REQUEST=FCQUERY DEVN Device Number Specifies the number (device address) of the device on
which you want to perform the FCQUERY command.
QRYSIZE Data Length Specifies the length of data obtained with QRYINFO.
FORMAT FQMAP Obtains QUERY information with the format using the
ANTFQMAP macro. For details about the format,
please refer to the IBM manual.
NO Obtains QUERY information with the format not using
the ANTFQMAP macro.
NO is the default setting.
QRYINFO QUERY Information
(Return Value)
Obtains information such as pair volume attributes of
FlashCopy® Mirror Version 2 pairs and the number of
pairs.
For details about the information, please refer to the
IBM manual.
RETINFO Return Value Obtains the return code and the reason code of the
execution results. For details about the codes, please
refer to the IBM manual.
Table 76 ANTRQST Macro Command Subparameters Supported by FlashCopy® Mirror Version 2
Command Subparameter Value Description