ADSM-L

Re: Tape Utilization

1998-02-05 12:54:50
Subject: Re: Tape Utilization
From: Donald Burdette <dburdett AT IX.NETCOM DOT COM>
Date: Thu, 5 Feb 1998 09:54:50 -0800
They are in full status and we are running the expiration processing. The
last tape, listed at 45.7 percent just finished filling up last night.

----------
> From: Hilton Tina <HiltonT AT TCE DOT COM>
> From: Hilton Tina <HiltonT AT TCE DOT COM>
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Tape Utilization
> Date: Thursday, February 05, 1998 8:54 AM
>
> Are these tapes in full or filling status?  Do you run inventory
> expiration?
>
> Tina Hilton
> Thomson Consumer Electronics
>
> > ----------
> > From:         Donald Burdette[SMTP:dburdett AT IX.NETCOM DOT COM]
> > Reply To:     ADSM: Dist Stor Manager
> > Sent:         Thursday, February 05, 1998 10:47 AM
> > To:   ADSM-L AT VM.MARIST DOT EDU
> > Subject:      Re: Tape Utilization
> >
> > The utilization figures I quoted have not changed since ADSM finished
> > writing to the tape. In some cases the reclamation percentage is only
> > 10-12%, leaving a large percentage of the tape unused.
> >
> > ----------
> > > From: Campbell Esplin <Campbell AT KINGSLEY.CO DOT ZA>
> > > To: ADSM-L AT VM.MARIST DOT EDU
> > > Subject: Re: Tape Utilization
> > > Date: Wednesday, February 04, 1998 11:21 PM
> > >
> > > Don, ADSM tracks the "free" space on your media as it writes new
> > data to
> > it
> > > and as it "invalidates"
> > > expired data. All of this is possible since the ADSM DB has full
> > knowledge
> > > of what each volume holds.
> > > So each volume over time will reflect different % utilization
> > figures.
> > The
> > > question is how "empty" would you
> > > like your tapes "not" to be. This is what's called your
> > PERCENTRECLAMATION
> > > threshold for your STGPOOL.
> > > So if you have RECLAMATION set on for a 50% threshold you should see
> > for
> > > instance that 003 and 004 will be
> > > consolidated onto 003 and 004 released for re-use.
> > >
> > > Campbell Esplin
> > > Excalibur Business Solutions
> > > ----------
> > > > From: Don Burdette <dburdett AT IX.NETCOM DOT COM>
> > > > To: ADSM-L AT VM.MARIST DOT EDU
> > > > Subject: Tape Utilization
> > > > Date: Thursday, February 05, 1998 6:44 AM
> > > >
> > > > I was wondering if someone could tell my why I am getting such
> > varied
> > > tape
> > > > utilization's. The tape utilization's go something like this:
> > > >
> > > > 001 = 91.5%
> > > > 002 = 66.3%
> > > > 003 = 39.3%
> > > > 004 = 45.7%
> > > >
> > > > The tape drive is a 3570-B12. I am not using compression at the
> > client
> > > and
> > > > I have the tape capacity set a 5 gig. Anybody have a clue as to
> > what is
> > > > going on?
> > > >
> > > > Thanks!
> > > >
> > > > Don Burdette
> >
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