FYI, here are my results (using DLT7000 drives) on my three largest storage
pools...  NT_TAPE is (obviously?) all NT servers, GEN_TAPE is Unix servers,
and COLOC_TAPE is collocated Unix servers.  I found it interesting that we
seem to get similar results as 3590K ( I thought they were lower capacity):

tsm: ADSM>select avg(est_capacity_mb) from volumes where status='FULL' and
stgpool_name='NT_TAPE' and pct_utilized=100

                       Unnamed[1]
---------------------------------
             44159.57391304347826
             44159.57391304347826

tsm: ADSM>select avg(est_capacity_mb) from volumes where status='FULL' and
stgpool_name='GEN_TAPE' and pct_utilized=100

                       Unnamed[1]
---------------------------------
            146740.16250000000000
            146740.16250000000000

tsm: ADSM>select avg(est_capacity_mb) from volumes where status='FULL' and
stgpool_name='COLOC_TAPE' and pct_utilized=100

                       Unnamed[1]
---------------------------------
            154356.40000000000000
            154356.40000000000000

Robin Sharpe
Berlex Laboratories




                    Jim Taylor
                    <jtaylor@ENLO
                    GIX.COM>      To:    ADSM-L AT VM.MARIST DOT EDU
                                  cc:    (bcc: Robin Sharpe/WA/USR/SHG)
                    06/20/01      Subject:
                    11:39 AM             Re: Data on my tapes
                    Please
                    respond to
                    "ADSM: Dist
                    Stor Manager"







David,

for what it is worth,

Here is a excerpt from a 'q vol' of some tapes marked as full from my
system.
----------------------------------------------------------------------------
-----
-----
Volume Name               Storage      Device      Estimated    Pct
Volume Name               Storage      Device      Estimated    Pct
Volume
                          Pool Name    Class Name   Capacity   Util
Status
                                                        (MB)
------------------------  -----------  ----------  ---------  -----
--------
--------
C00083                    TAPEPOOL     TAPE3590    203,025.7  100.0    Full
C00083                    TAPEPOOL     TAPE3590    203,025.7  100.0    Full
C00084                    TAPEPOOL     TAPE3590    152,142.7   42.2    Full
C00086                    OFFSITE      TAPE3590    195,116.3   95.4    Full
C00087                    TAPEPOOL     TAPE3590    206,932.1   65.6    Full
C00093                    TAPEPOOL     TAPE3590    196,629.9   34.1    Full
----------------------------------------------------------------------------
-----
-----
Most of the backups are of Oracle DB on an AIX platform.  If I take into
Most of the backups are of Oracle DB on an AIX platform.  If I take into
account the size of the data being backed up and the est. cap. of the
tapes,
once full, I would have to say that the est. cap. is fairly accurate.

Jim Taylor