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Number   :  7861
Date     :  2004-05-11
Author   :  Garry Deane
Subject  :  Re: Incremental Backups
Size(KB) :  1


--- In xxcopy@yahoogroups.com, "ehathgepiurhe"  
wrote:
> Hi,
> 
> I was wondering if someone could tell me if xxcopy could do
> the following:
> Say I have a number of files I wish to backup. I would also
> like to keep an old backup of these files just in case they
> get corrupted. I could simply copy these files to a CD once
> a month, but my memory isn't that good (& it is a waste of
> CD's), so I was wondering if I could do it with xxcopy. The
> way I see it happening would be:
> 1. The first time I run xxcopy, it would copy the files to a
> backup directory. Let's call the directory the files are in
> directory A, the backup directory is B.
> 2. The next time I run xxcopy (say a week later), it would
> copy the files from directory B to directory C, which is the
> old copy I want to keep in case of corruption. It would then
> copy the files from directory A to directory B. So, we would
> have the backup copy in directory B, another copy in C.
> 3. The third time xxcopy is run, it would copy B to C, then
> A to B. 
> The same with the every subsequent xxcopy run.
> Can this be done with xxcopy, or is there another, better,
> simpler way for me to do this?

Sure, just put your xxcopy commands in a batch file and
schedule it to run as often as you like. If you want
directory C to hold all the files, simply do:

xxcopy \B\ \C\ /clone/pz0
xxcopy \A\ \B\ /clone/pz0

If you want directory C to just hold the updated files, you
could do a three-way differential backup as explained near
the end of Technical Bulletin #11.

You can get even fancier and save all versions of files
that have been modified or deleted to directory C using
more complex schemes. See for example the (NT+) batch file
I posted in Msg #7857.

It's just a matter of deciding what you want then putting
together the xxcopy commands needed.

Garry



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