HP 3PAR Operating System Software - Manual (Page 86)

14 Viewing Remote Copy System Information
For more information: Issue this command: To view information on:
“About the Remote Copy Commands”
(page 222) showrcopy Configuration details
statrcopy Link throughput and latency statistics
statrcvv Virtual volume statistics (such as I/O
number, size, and completion time)
histrcvv Historical volume statistics
Solution Problem
Ensure links are up on both systems and try the command
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 could not be
contacted
For more information: Issue this command: To view information on:
“Viewing Synchronization Task
Information” (page 87) showtask Synchronization details
“Viewing More Detail for a
Synchronization Task” (page 88) showtask -d Additional details for a
synchronization task
“Viewing Earlier Synchronization Tasks”
(page 88) showtask -t List of synchronization tasks started
within a specific timeframe
Additional Information:
•
“How Remote Copy Tracks Synchronization Details” (page 86)
•
“Task Management Commands for Remote Copy Synchronizations” (page 88)
•
showtask information: HP 3PAR CLI Reference
•
Task management information: HP 3PAR InForm OS Concepts Guide
How Remote Copy Tracks Synchronization Details
When a volume synchronization or resynchronization takes place on a system running under
Remote Copy, the system creates tasks to track the initial synchronization and the resynchronization
operations.
For example, when you use the startrcopygroup command to start (and synchronize) a Remote
Copy volume group for the first time, the system creates a task for each primary volume group that
is being started and synchronized in order to track the initial synchronization of the primary and
secondary volume groups.
Tracking Synchronous Volume Groups
For synchronous mode volume groups, the startrcopygroup command prompts resynchronization
each time it is used.
Tracking Asynchronous Periodic Volume Groups
For asynchronous periodic mode volume groups, the startrcopygroup command starts
synchronization only the first time the command is issued for a volume group. Subsequent instances
of the command do not initiate resynchronizations of asynchronous periodic mode volume groups.
86 Viewing Remote Copy System Information