Hi Jason,

"query volume <volume name>" does show the estimated capacity.  However,
as the Sys Admin you can set that number.  So you need to know how the
devclass was setup.  Was it set to have the system estimate the
capacity, or was the estimated total capacity defined by the Sys Admin.

I based my numbers by assigning a estimated total capacity, then once
the system "filled" the tape, I verified the capacity with "query volume
<volume name> f=d".  For example:

adsm> q vol 000011

Volume Name                 Storage        Device        Estimated
Pct     Volume
                            Pool Name      Class Name     Capacity
Util     Status
                                                              (MB)

------------------------    -----------    ----------    ---------
-----    --------
-----    --------
000011                      SCALAR         AIT           102,400.0
000011                      SCALAR         AIT           102,400.0
42.0    Filling

Note that since volume 000011 is still filling, the assigned estimated
capacity does not accurately reflect how much data is on the tape.  Only
after the system has marked the tape as full, will you get an accurate
estimated data capacity.  For example:

adsm> q vol 000010 f=d

                   Volume Name: 000010
             Storage Pool Name: SCALAR
             Device Class Name: AIT
       Estimated Capacity (MB): 55,183.5
                      Pct Util: 100.0
                 Volume Status: Full

And as Mark mentioned before, your mileage may vary.  Oh and Mark,
Thanks for the info on AITC.  My documentation only mentions AITC for
the compression on Sony SDX-500C devices, so that is good to know.

Thanks, -JJ

"Remeta, Mark" wrote:
>
> query volume should show estimated capacity.
>
> -----Original Message-----
> From: Jason Howard [mailto:jason.howard AT MINDSPRING DOT COM]
> Sent: Wednesday, January 12, 2000 9:54 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Upgrade AIT -1 to AIT-2
>
> Is there any easy way to see how much data is being stored on each volume?
>
> Jason Howard wrote:
>
> > I have an ADIC Scalar 1000 with 4 AIT1 drives.  I need to add at least 4
> > new drives.  I would like to replace my current 4 AIT1 drives for a
> > total of 8 AIT2 Drives.  What is the tape compatabilty between AIT1 and
> > AIT2?  Can I run 4 AIT 1 and 4 AIT2 drives in the same library accessing
> > the same tapes?
> >
> > What are my options, and has anybody done this before?
> >
> > --
> > Jason Howard
> > Systems Adminstrator
> > Blue Cross and Blue Shield of Alabama
> > jhoward AT bcbsal DOT org
> > PHONE 205-444-6203
> > FAX 205-220-8503
> > www.bcbsal.org