Jeff Abrahamson on Sun, 31 Aug 2003 14:51:06 -0400


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Re: [PLUG] Disk-to-disk backup


On Sun, Aug 31, 2003 at 01:46:25PM -0400, mjd-lists-plug@plover.com wrote:
>   [21 lines, 159 words, 1082 characters]  Top characters: e_tinaol
> 
> 
> > Uh... Why not use tar? 
> 
> Several reasons.  One is that I use the backup for several purposes.
> One is to have a recovery path in case of a catastrophe.  Tar would
> work OK for that.  But by far the more common use is for me to restore
> single files that I've accidentally deleted (for which tar is slow)
> and to compare the curent version of a file with the backup version
> (ditto).  Finally, the tar format is very fragile; if a single byte
> gets corrupted in the wrong place, the entire file can become
> unreadable.  Compressing the tar files would make the files even more
> fragile; a single bit corruption anywhere in the file would render the
> entire file useless.
> 
> I'm using 'cp -a' now, but there are some things I don't like about
> it.  The lack of incremental backup is one of them.

Have you looked at rsync incremental backup?

    http://freshmeat.net/projects/ribs/?topic_id=137
    http://freshmeat.net/releases/107189/
    http://rustyparts.com/scripts.php

-- 
 Jeff

 Jeff Abrahamson  <http://www.purple.com/jeff/>
 GPG fingerprint: 1A1A BA95 D082 A558 A276  63C6 16BF 8C4C 0D1D AE4B

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