3PAR InForm OS 2.3.1 MU2 Release Note (325-200142 Rev B, October 2010)

2.13
Known Issues with the InForm OS
InForm OS Version 2.3.1 MU2 3PAR InForm OS Release Notes
3PAR Confidential
2.7.5 Remote Copy and Recovery Manager Snapshot Interaction Issues
When a non-zero scheduled synchronization period is specified for an Asynchronous Periodic
Remote Copy volume group, any application coordinated snapshots taken on the same
Remote Copy group by Recovery Manager may conflict with the periodic snapshots taken by
Remote Copy. This can result in Remote Copy (RC) snapshots that cannot be deleted and/or are
not coordinated with the application.
 Workaround:
Remote Copy can support the mixture of Recovery Manager snapshots and Remote Copy
snapshots (outside of Recovery Manager) if the following procedure is followed:
Inside the Recovery Manager Windows scheduler script:
1) Set the Remote Copy period to 0.
2) Verify Remote Copy SyncStatus as "Synced".
3) Execute Recovery Manager snapshot creation for Remote Copy.
4) Wait for SyncStatus to be completed and Recovery Manager to take a snapshot of
secondary volumes.
5) Recovery Manger will monitor the SyncStatus to be "Synced" every 120 seconds as
default then issue snapshot creation of secondary volumes. Wait until these
snapshots complete.
6) Reset Remote Copy period to the sync period it was at prior to setting to 0 in step 1.
WARNING: Steps 2 and 4 are critical to ensure Recover Manager-created
snapshots and Remote Copy-created snapshots do not interfere with each other.
NOTE: See Product Alert 247-200010 in DCS for a more detailed explanation.