Operating System Software Owner manual

16 Performing Manual Operations
For more information:Issue this command:To manually:
“Changing the Remote Copy Mode for
a Volume Group” (page 91)
setrcopygroup modeChange the mode of a volume group
“Manually Resynchronizing Volume
Groups” (page 92)
syncrcopySynchronize primary and secondary
volume groups
“Changing Secondary Volume Groups
to Primary” (page 93)
setrcopygroup failoverChange volume group roles for
disaster recovery purposes
“Stopping and Starting Remote Copy”
(page 94)
stoprcopygroup
startrcopygroup
Stop and restart Remote Copy
“Removing Remote Copy Completely”
(page 94)
stoprcopygroupErase the Remote Copy configuration
SolutionProblem
Ensure links are up on both systems and try the command
again. and again. For more information, see “Checking
the Links between Systems” (page 70).
If the mirror 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
Changing the Remote Copy Mode for a Volume Group
NOTE: Remote Copy allows you to assign one mode (synchronous or asynchronous periodic)
per target system. In other words, all primary volume groups on the primary system must either all
be in synchronous or all be in asynchronous periodic mode.
1. Stop the primary volume group on the primary system. (Resynchronization snapshots remain
on the system.) Enter either:
# stoprcopygroup <group_name>
• <group_name> - Name of the primary volume group
or:
# stoprcopygroup -pat <pattern>
• <pattern> - Pattern of volume group names to stop (for example, Group*)
2. Change the mode of the volume group.
# setrcopygroup mode <mode_value> <target_name> <group_name>
• <mode_value> - New Remote Copy mode (sync or periodic)
• <target_name> - Name of the backup system for the volume group you are changing
• <group_name> - Name of the primary volume group
Changing the Remote Copy Mode for a Volume Group 91