To the best of my knowlege it will.  Estimated capasity is only used
untill the tape is filled the first time so that you can get a estimate of
the storage pools capacity.  (number of volumes x estimated capacity per
volume = estimated capacity of the storage pool)

Actual capacity is a function of actual tape length per cartrage, and
compression rate.  It will fluxuate based on the type of data you are
backuing up or archiving.

Keith Davey


On Mon, 18 Dec 2000, Kelly J. Lipp wrote:

> If you set the estimated capacity at some number, will it fill the tape
> beyond that capacity?  I am under the impression that it won't.
>
> Kelly J. Lipp
> Storage Solutions Specialists, Inc.
> PO Box 51313
> Colorado Springs CO 80949-1313
> (719) 531-5926
> Fax: (240) 539-7175
> Email: lipp AT storsol DOT com or lipp AT storserver DOT com
> www.storsol.com
> www.storserver.com
>
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf Of
> Kenneth & Susan Bury
> Sent: Monday, December 18, 2000 4:47 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Estimated Capacity of 3590-K tapes
>
>
> You will have to manually change the default capacity in your devclass to 40
> GB. We noticed that when we upgraded to the 3.7 server we actually dropped
> to 10 GB. If you look at the help pages (on 3.7) you will notice that Tivoli
> thinks the 3590E-C capacity is only 10 GB. Go figure.
>
> Ken
>
> > -----Original Message-----
> > From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]On Behalf 
> > Of
> > Eliza Lau
> > Sent: Monday, December 18, 2000 14:45
> > To: ADSM-L AT VM.MARIST DOT EDU
> > Subject: Estimated Capacity of 3590-K tapes
> >
> >
> > Hi All,
> >
> > We just upgraded all the 3590B1A drives in the 3494 to 3590E1A with the
> > option to support the Extended Length 3590-K tapes.
> > I did the following to redefine the drives:
> >
> > rmdev -l rmt1 -d
> > cfgmgr
> > adsm> upd devclass 3590tape format=3590E-C
> > adsm> del drive 3494lib tapedrive1
> > adsm> def drive 3494lib tapedrive1 device=/dev/rmt1
> >
> > The old 3590-J tapes are now showing an Estimated Capacity of
> > 20GB.  However,
> > the new 3590-K tapes also show an Estimated Capacity of 20GB.  Since the
> > K tapes have twice as much tape as the J tapes, they should be 40GB.
> > What do I need to do to make the K tapes show up as 40GB?
> >
> >
> > Server: AIX 4.3.3
> >         ADSM 3.1.2.58
> >
> > Thanks,
> > Eliza
> >
> > ------------------------------------------------------------------
> > ------------
> >  Eliza Lau
> >  Virginia Tech Computing Center                email : eliza.lau AT vt DOT 
> > edu
> >  Virginia Polytechnic Institute & State University
> >  1700 Pratt Drive
> >  Blacksburg VA 24060                           phone : (540) 231-9399
> > ------------------------------------------------------------------
> > ------------
> >
>