Are you referring to sparse files? Sparse files
usually cause this.

--- jago <javier.graf AT usa DOT net> wrote:
> 10 to 1 that you are backing up databases!
> 
> When you backup certain db's the compression factor
> could be 1/4 because of
> the free space you have inside the "assigned" db
> file.
> 
> Sincerely yours
>  
> T4B Group AG
>  
> Javier González
> GM IT Services
> <mailto:jg AT t4b DOT ch> 
> www.t4b.ch
>  
> 
> 
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On
> Behalf Of
> justin AT brighton.ac DOT uk
> Sent: Freitag, 5. April 2002 15:14
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] How can 160-180 GBytes fit
> onto a 80 GByte DLT
> tape
> 
> 
> Thanks for all your replies concerning duplicating
> images spanning over a
> couple of tapes (Subject: Duplicated faulty tape).
> 
> Something else is confusing me!  NetBackup reports
> we're fitting around
> 160-180 GBytes on each DLT tape!  Surely not?  The
> quoted capacity of a
> DLT IV in a DLT 8000 drive is 80 GBytes (assuming a
> 2:1 compression
> ratio).  Does anyone have a logical explanation or
> is the compression
> really that good? :)
> 
>  ID     type    type      #     slot    face   
> level  KBytes
>
-------------------------------------------------------------------------
> ---
> BK0014  DLT      NONE     -       -      -       5  
>   192122560       
> FULL
> 
> Many thanks, Justin
> -- 
> \ Justin
> / Network Services, University of Brighton
> _______________________________________________
> Veritas-bu maillist  - 
> Veritas-bu AT mailman.eng.auburn DOT edu
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> 
> _______________________________________________
> Veritas-bu maillist  - 
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>
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