Operating System Software User Manual

1. Issue the following command to set up a volume group on the primary storage system (System1):
# creatercopygroup <group_name> <target_name>:<mode>
where:
• <group_name>—Name of the volume group (Group1)
• <target_name>—Name of the target system (System2)
• mode—Specifies asynchronous periodic mode
For more information, see “Volume Group Modes” (page 120).
The creatercopygroup command creates the following:
• A primary volume group (Group1) on the primary system (System1).
• A name for the corresponding secondary volume group using the convention:
<primary_group_name>.r<sys_ID> (of the primary system)
In this example, the secondary volume group is named Group1.r112.
• The corresponding secondary volume group (Group1.r112) on the target system (in this
case, the backup system, System2).
SolutionProblem
Ensure that links are up on both systems and try the
command again. For more information, see “Checking
the Links between Systems for Unidirectional Remote
Copy” (page 80).
If the backup system does not respond to a command
after 5 minutes (the timeout limit), an error message
appears:
target system <sys_name> could not be
contacted
2. (Optional). If you are not using tape to make the first copy of the data on the primary system,
you can set up automatic resynchronization.
CAUTION: Do not set a resynchronization period at this point if you plan to perform the
initial synchronization and backup using tape. For more information, see “Using Tape for
Initial Synchronization and Backup” (page 151).
To specify a synchronization period for a primary volume group, on the primary system
(System1), issue either of the following commands:
# setrcopygroup period <period_value>s|m|h|d <target_name> <group_name>
where:
• <period_value>|m|h|d—Synchronization period (time between start of
resynchronizations), followed by time unit: m (minutes), h (hours), or d (days)
• <target_name>—Name of the target system (System2)
• <group_name>—Name of the primary volume group (Group1)
or:
# setrcopygroup period <period_value>m|h|d <target_name> -pat <pattern>
where <pattern> represents the pattern of volume group names (for example, Group*)
52 Setting Up M-to-N Remote Copy