backups spanning tapes help

[Ted Mittelstaedt]

Hi Brent,

  The BSD tar that is in FreeBSD cannot span tapes, you have to
use gtar.  (GNU tar)  the old original tar in FreeBSD was gtar,
then they renamed tar to gtar, and added in a BSD tar (that
is unencumbered code)

  man gtar should tell all you need.

  Also a note on your 8MM, 14gb compression is a salesman's
fantasy.  I think they use test files that must contain 100,000
binary 1's to get those numbers.  Your more realistic to expect
about 10GB with the tape hardware compression or even 9GB.

  Also, files like mp3's and jpgs are already compressed so
you gain nothing with hardware compression on those.

Ted

>-----Original Message-----
>From: owner-freebsd-questions at freebsd.org
>[mailto:owner-freebsd-questions at freebsd.org]On Behalf Of Brent
>Sent: Monday, December 26, 2005 5:05 AM
>To: freebsd-questions at freebsd.org
>Subject: backups spanning tapes help
>
>
>We use a freebsd box that has a old 8mm library drive attached 
>that we use for
>backups..my question is these tapes hold 7gigs native or 14 gig 
>compressed
>..One i cant seem to get compression going so i was wondering 
>how do you span
>tapes using tar ? Unless theres another way to do this 
>
>thank you for your help & Merry Christmas
>
>--
>Brent Bailey CCNA
>Bmyster LLC
>
>
>--RIP Brother Dime--
>
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