HP XP P9500 Reference Manual page 250

GMT
This value means that the specified time is in GMT.
NOTE: When you specify the time using ATTIME parameter, note the following:
Do not specify a time value earlier than the command execution time.
The processing might be suspended when the specified time is reached during command
execution. Take the command execution time into consideration when you specify the time.
Do not specify a time value larger than the command execution time plus 65,536 minutes.
To check the specified time in another way, see the ISPF log or the execution result of the
script.
Do not specify a time later than 2042/9/17 23:53:47 GMT.
If the host on which the command is executed is different from the host that issues an I/O to
the storage system, synchronize the time between the hosts.
ATOPT({NORMAL|CAJ[({STEADY|QUICK})]})
Applies to Business Copy for Mainframe.
Specify the type of CAJ ATTIME suspend function to be used. If you omit this parameter, the value
specified in the ISPF panel when the BC copy pair was defined will be set.
NORMAL
The NORMAL ATTIME suspend function is used.
CAJ
The CAJ ATTIME suspend function is used.
A suspend mode (STEADY or QUICK) is set for the value specified on the ISPF panel during the
BC copy pair definition.
CAJ(STEADY)
The CAJ ATTIME suspend function is used. The suspend mode is set to STEADY.
The S-VOL can be referenced and updated after the data has been completely copied and the
status has changed to SUSPOP.
CAJ(QUICK)
The CAJ ATTIME suspend function is used. The suspend mode is set to QUICK. The S-VOL can be
referenced and updated even while data is being copied.
TIMEOUT(timeout-value) ~ <numeric characters> ((0 to 9999))
Applies to Business Copy for Mainframe.
If you use the CAJ ATTIME suspend function, specify the timeout value in minutes. When the journal
is acquired at the remote storage system, the copy pair is suspended when the time period specified
in the TIMEOUT parameter elapses after the time that was specified in the ATTIME parameter.
This suspension takes place even if the update journal is not acquired after the time specified in
the ATTIME parameter, or even if no-update journal is detected. Note that if the CAJ copy pair is
in the SUSPEND status at the ATTIME suspend time, the value specified in the TIMEOUT parameter
will become invalid, and the BC copy pair will be suspended at the ATTIME suspend time.
If you specify 0 or omit this parameter, the timeout value determined by the storage system will be
set.
If you do not use the CAJ ATTIME suspend function, the value specified in the TIMEOUT parameter
will become invalid, and if no I/O for the P-VOL is detected after the ATTIME suspend time has
250 CLI Commands