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From: Adam.Frix@p2.f200.n226.z1.FIDONET.ORG (Adam Frix)
Newsgroups: comp.sys.mac
Subject: RE: Incremental Backup Utility
Message-ID: <45649.2602A191@cmhgate.FIDONET.ORG>
Date: 17 Mar 90 04:56:20 GMT
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In a message of 03/13/90, Cliff Loucks wrote -

> We are looking for a utility to do incremental (daily) backups.  We
> have a Tops network including a Sun and would like to use the Sun disk
> to store these daily backups.  (We have a cartridge drive which is
> sneakered around to individual machines to do full backups.)
> 
> What we would like is an application which would search a disk for all
> files modified since a specified date, and copy those files (in Finder
> format) to another disk/folder (on a Tops mounted volume on the Sun in
> our case).  All the backup utilities I have seen so far are set up to
> allow incremental backups only after first creating a full backup and
> these are usually not Finder copies.

By your comment about "not Finder copies," I'm going to take it that
you've looked at Redux, which under normal circumstances (backing up a
hard disk to floppies) backs up in its own file format.  However, if
everything you wish to back up will fit on one target volume, you can
use Redux's Copy option.  This is faster than Finder copy, and leaves
the files in Finder format.  And, I quote from page 6 of their current
manual, "Copy can be used across a network:  Use Copy if you wish to
use a target disk which is mounted elsewhere on an AppleShare or TOPS
network."

And again, under normal circumstances with Redux you do a full backup
first, then incremental backups as needed.  But Redux has several very
powerful controls the user can manipulate in order to back up
virtually any combination of files.  In addition to its scripting
language, which would definitely work in your situation, Redux offers
Filter controls.  The Filter dialog allows the user to do several
things at once:  in a folder or volume, you can (check or uncheck
[pick one]) (all files, all system files, all applications, all
documents [pick one]) (which start with, which end with, which
contain, older than, newer than, of type [pick one]) and then tell
Redux to DO IT.  While the scripting language offers more flexibility
(the BackTalk language allows the use of a Date clause which would let
the user define, for example, "all files less than 2 weeks old and
more than 1 week old"), the Filter Controls are more powerful because
they're more readily available to a wider range of users and are more
intuitive to use.

Hope this helps.

--Adam--

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