HP Storage Mirroring Software - Manual (Page 575)

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Properties Source tab can be on or off. The use of this option does not change the action
performed during the mirror.
Server
Properties
Source
Tab
Connection Manager Mirroring
Tab or Start Mirror Dialog
Action Performed
Checksum
All
File
Differences
Only if
Source
is
Newer
Checksum
(X) X
Any file that is different on the
source and target based on the
date, time, and/or size is
transmitted to the target. The mirror
sends the entire file.
(X) X X
Any file that is newer on the source
than on the target based on date
and/or time is transmitted to the
target. The mirror sends the entire
file.
X X
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.
X X X
The mirror performs a checksum
comparison on all files and only
sends those blocks that are
different.
(X) X X X
Any file that is newer on the source
than on the target based on date
and/or time is flagged as different.
The mirror then performs a
checksum comparison on the
flagged files and only sends those