HP StorageWorks Storage Mirroring for Linux User's Guide (T2558-96317, June 2009)

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Controlling an automatic mirror
In certain circumstances, for example if the disk-based queues on the source are exhausted, Storage
Mirroring will automatically disconnect connections (called auto-disconnect) and then automatically
reconnect them (called auto-reconnect). In order to ensure data integrity on the target, Storage
Mirroring will perform an automatic mirror (called an auto-remirror) after an auto-reconnect.
1. Right-click a server in the left pane of the Management Console and select Properties.
2. Select the Setup tab.
3. Verify that the Perform Remirror After Auto-Reconnect check box is selected to initiate an
auto-remirror after an auto-reconnect.
4. Specify the type of mirror that you wish to perform.
 File Differences with Checksum—Any file that is different on the source and target based
on date, time, and/or size is flagged as different. The mirror then performs a checksum
comparison on the flagged files and only sends those blocks that are different.
 File Differences with no Checksum—Any file that is different on the source and target
based on date, time, and/or size is sent to the target.
NOTE: Auto-remirror is a per source option. When enabled, all connections from the source will
perform an auto-remirror after an auto-reconnect. When disabled, none of the
connections from the source will perform an auto-remirror after an auto-reconnect.
NOTE: If auto-remirror is disabled and an auto-reconnect occurs, the transmission state of
the connection will remain pending after the reconnect until a mirror is started
manually.