HP 3PAR Operating System Software - Manual (Page 82)

Creating Volume Groups for Unidirectional Remote Copy
Remote-copy volume groups are pairs of virtual volume sets that are logically related and that are
used when data needs to be consistent between specified sets of virtual volumes. For more
information, see
“Working with Volume Groups” (page 110) .
NOTE: You can create groups and add volumes to groups without disrupting host access to
volumes.
1. 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> —sync for synchronous mode or periodic for asynchronous periodic mode
For more information, see “Volume Group Modes” (page 120) .
The creatercopygroup command:
•
Creates a primary volume group (Group1) on the primary system (System1).
•
Creates a name for the corresponding secondary volume group using the convention:
<primary_group_name>.r<sys_ID> (of the primary system)
Therefore, in this example, the secondary volume group is named Group1.r112.
•
Creates the corresponding secondary volume group (Group1.r112) on the target system
(in this case, the backup system, System2).
Solution Problem
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 creating a volume group that uses periodic mode, you can set up
automatic synchronization.
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 resynchronization period for a primary volume group, on the primary system
(System1), enter either of the following commands:
# setrcopygroup period <period_value>s|m|h|d <target_name> <group_name>
82 Unidirectional Configuration