[comp.sys.mac] Incremental Tape Backup

stuart@cbnewsc.ATT.COM (S. D. Ericson) (12/01/89)

I've been looking into buying a tape drive for backups lately,
any reviews from you net.mac.lovers?  My latest concern is
wether tape drives handle incremental backups well.

It is clear that tapes are GREAT for full backups, but how do
they deal with situations where you have changed a few data
files, and want to only change them on your backup tape.

When I do backups with Redux (1.5), The software is smart enough
to know that it only needs to update the files that have changed,
so I don't ususally have to add new disks to my backup set.  It
deletes the old copy and replaces it with newly changed files.

Can you do this with a tape?  If not, a 60MB tape could quickly
get filled up with duplicates.  If you can do it, then how
efficient is it?  Would it be faster with floppies?  I know
that tapes can be slow when they rewind or back up a bit, and
I'm not even sure that streaming tapes CAN back up by a file
or so...

Any ideas.

Thanks....

Stuart
Official Tech support for my Dad's DEC Rainbow - yeah, I know, I
want him to get a mac too!
	

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Stuart Ericson                  AT&T Bell Laboratories    | Note: area code 312
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