Re: why adsm marks my tape full?

yu chen,

One thing I'd suggest is to do a 'q vol dlt007 f=d' and check out the "Pct.
Reclaimable Space" value.  If that value is exactly or approximately 35.8,
then you probably are getting close to full utilization but are
accumulating a lot of expired data before the tape even has a chance to
fill.  That may be normal operation if you backup so little data each night
that many days of backups are required to fill a tape.

Another thing to consider is the nature of the data you're backing up.
Perhaps the data being written to this particular tape is less compressible
than the rest of your data.

Dennis Schaffer
Mutual of Omaha






ychen AT NCTR.FDA DOT GOV on 10/29/98 04:18:19 PM

Please respond to ADSM-L AT VM.MARIST DOT EDU

To:   ADSM-L AT VM.MARIST DOT EDU
cc:    (bcc: Dennis Schaffer)
Subject:  why adsm marks my tape full?




hi adsmers,
is there anyone out the experienced the same thing: i just noticed that
sometimes adsm changes a filling tape to status full even tho' the tape
still got plennnnnnnty of room to put data in. to be more specific, before
i did a "move data dlt009" i had:


adsm> q vol dlt*
Volume Name                  Storage         Device         Estimated
%Util      Volume
                             Pool Name       Class Name      Capacity
Status
                                                                 (MB)
------------------------     -----------     ----------     ---------
-----     --------
-----     --------
DLT001                       DLT-LIBRARY     DLT-AUTO        27,578.4
DLT001                       DLT-LIBRARY     DLT-AUTO        27,578.4
58.8       Full
...
DLT007                       DLT-LIBRARY     DLT-AUTO        35,840.0
50.9     Filling
DLT008                       DLT-LIBRARY     DLT-AUTO        35,840.0
6.7     Filling
DLT009                       DLT-LIBRARY     DLT-AUTO        35,840.0
3.8     Filling
...


it then moved data off dlt009 to dlt007. but now i have:


adsm> q vol dlt*
Volume Name                  Storage         Device         Estimated
%Util      Volume
                             Pool Name       Class Name      Capacity
Status
                                                                 (MB)
------------------------     -----------     ----------     ---------
-----     --------
-----     --------
DLT001                       DLT-LIBRARY     DLT-AUTO        27,578.4
DLT001                       DLT-LIBRARY     DLT-AUTO        27,578.4
58.8       Full
...
DLT007                       DLT-LIBRARY     DLT-AUTO        30,399.7
64.2       Full
DLT008                       DLT-LIBRARY     DLT-AUTO        35,840.0
7.4     Filling
DLT009                       DLT-LIBRARY     DLT-AUTO             0.0
0.0      Empty
...


also, i don't seemed to be able to utilize the whole tape, the estimated
full capacity is 35G but it got marked full somewhere around 30G. my
devclass of dlt's definition is -format=drive.

thanks.


yu chen



-- The Lost Patrol. Level 30~36, HP 800, AC -2. The Highway Patrol of
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