Re: [Networker] volume capacity part 2
2004-04-14 14:15:33
Wow, I knew that there would be some variance in the
compression but didn't think it could be that much. I
tested some restores and the data is good!!
Thanks again
--- Darren Dunham <ddunham AT TAOS DOT COM> wrote:
> >
> > After feedback from the list I realized that I was
> > using data compression incorrectly by using
> hardware
> > compression as well as unix with compression
> > directives, that has been changed to hardware
> > compression only.
> >
> > In addition I verified that I have all 100/200 LTO
> > Ultrium tapes loaded in the Jukebox but....
> >
> > I am seeing tape capacity figures that are all
> over
> > the place. Some show Full at 181GB and 169GB and
> that
> > makes sense but I am also seeing some show Full at
> > 335GB and 362GB which does not make sense.
>
> But possible. Some data (especially from some
> databases) is highly
> compressible. 2:1 is just a target... impossible
> for already compressed
> data, easy for other types of data.
>
> If you have concerns about the compressibility, just
> go ahead and do
> some sample restores from that volume (some near the
> front, some near
> the back) and make sure it's all good.
>
> > If I have a 100GB tape that should only be able to
> > show 200GB max compressed how am I getting figures
> > over 200GB? any ideas?
>
> 200GB is not a max.
>
>
> --
> Darren Dunham
> ddunham AT taos DOT com
> Senior Technical Consultant TAOS
> http://www.taos.com/
> Got some Dr Pepper? San
> Francisco, CA bay area
> < This line left intentionally blank to
> confuse you. >
>
> --
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