hi,
y'all made very good points here as i browse through your replies. thanks
a lot. i think i can handle the tape density part now. :)
yes it is exactly 35.8% reclaimable. right on target! as i'm still think
about this, how come a filling tape accumulates reclaimable space faster
than a full tape? i'm assuming a filling tape contains fresher data than
full tapes. it sure wasn't that easy to expire off 10G of data on any of
my full tapes. interesting.
i guess the latter is the case then.
thanks. i appriciate it and am educated. :)
yu chen
-- The Lost Patrol. Level 30~36, HP 800, AC -2. The Highway Patrol of
The Random Road, They Keep The Peace, They Eat Donuts. -TRR '97
The Random Road, They Keep The Peace, They Eat Donuts. -TRR '97
On Thu, 29 Oct 1998, Dennis Schaffer wrote:
** 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
** 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
** 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
** The Random Road, They Keep The Peace, They Eat Donuts. -TRR '97
**
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