Optional parameters

CGINTERVAL: Optional with START and RESUME and ignored for all other actions, this specifies, in seconds, the wait time between the end of one consistency group formation and beginning of the next. If 0 is specified, consistency groups are formed continuously. This parameter must be entered along with CGDRAIN and COORDINTERVAL. It cannot be entered alone.
CGDRAIN: Optional with START and RESUME and ignored for all other actions, this specifies, in seconds, the time allowed for updates on primaries to drain to remote secondaries. The default is 30 seconds. If 0 is specified the default is used. Valid values range from 0000 to FFFF. This parameter must be entered along with CGINTERVAL and COORDINTERVAL. It cannot be entered alone.
COORDINTERVAL: Optional with START and RESUME and ignored for all other actions, this specifies, in milliseconds, the maximum time allowed for the master storage control to coordinate a consistent data point with storage control subordinates. The default is 50 msecs. If 0 is specified the default is used. Valid values range from 0000 to FFFF. This parameter must be entered along with CGINTERVAL and CGDRAIN. It cannot be entered alone.
SUBCHSET: Specifies the subchannel set in which the command is to be issued. The subchannel set where the I/O will be issued is the subchannel set as defined in the Hardware Configuration Dialog (HCD). The valid values are determined by what is supported by the host system's processor and configured for the device.
If you omit the parameter, the command is issued to the device that is logically in subchannel set 0. If a swap has occurred, this could be the device that was defined in an alternate subchannel set in the I/O configuration (IODF), with HCD.