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Re[4]: Backup (hardware) for Linux



Ira Abramov <ira@scso.com> wrote:
>  
>  On Wed, 15 Jul 1998, Evgeny Stambulchik wrote:
>  
>  > udif@usa.net (Udi Finkelstein) wrote:
>  > 
>  > >  DDS2
>  > >  Includes hardware compression (I've never heard about a DDS2 drive
>  > >  with no compression engine built in)
>  > 
>  > For example, SONY SDT-5200. Very good drive. BTW, I think hardware
>  > compression isn't important. The compression is usually not very good
>  > (like w/ compress(1)), 
>  
>  that's why Amanda (the software I recommended you) gzips up dumps before
>  backing up. if I ever get the time, I'll engineer it to switch to bzip2
>  maybe. gzip is better comression than the DDS-2's hardware comression.

Does Amanda gzip's on a per-file basis or the whole archive like tar xz? The
latter makes backups extremely unreliable. BRU compresses separate files. Among
free software, cpio and/or afio can do this, too.

Regards,

Evgeny
 


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