You might want to look at robocopy which is part of the reskit. It will synchronize directories and only copies changed files.
That makes a lot of sense when most files don't change in a 24-hour period, but, in the case of mailboxes, they change every hour.

It also can recover from network errors and will restart the copy from where it left off.
If it's not too slow (and apparently there are considerably speed differences between Norton Ghost and PowerQuest Drive Image), I think it's worth investigating snapshotting the OS+Imail partition (which should have no other apps, or almost none) and the mailbox partition(s) with a partition imager, and sending the image files to the standby machine.

Rather than just grabbing the mailbox partition, the image of the os+Imail partition would give you the execution environment exactly the way it was on the original machine, and obviates the very difficult and time-consuming (ie, you're bound to screw it up if you even remember to do it) chores of keeping the os+imail+tools on the standby machine manually patched/updated/sync'd to the production machine.

This is a another very good argument (against those NTFS5/6 lovers who prefer running only one single 80 Gb partition "just because I can finally put all my eggs in one basket") for keeping partitions smaller and segregating the various of types of data onto different filesystems (os+exe's, swap, mail spool, data1, data2, etc).

"Because an 80 Mb NTFS5 partition now works" totally ignores system operation and maintenance. A lot of maintenance operations (de-frag, partition imaging, backup/restore, etc) don't scale well. Selecting the appropriate level of physical and logical chunking / granularity is an important concept in system design.

Len


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