Alex,
     I don't know if I'm using EXTERNAL library types.  How would I tell?
I have a 3466-C10 that was originally internal (rack) DLT changer (15
slots)

We  '"down"graded' it to a C00 and bought 3494 w/3590s.  Would that be
considered a 'third' party media even though its both IBM?
What difference should it make anyway? The *SM software should handle it
the same.   And I don't care about the status after mounting I care about
the status of the tape and drive after the tape is "IDLE" and no longer in
use but still mounted.

thanks ... joe.f.


Joseph A Faracchio,  Systems Programmer, UC Berkeley


On Mon, 5 Feb 2001, Alex Paschal wrote:

> Joseph, Joel, out of curiosity, is there any chance are you using EXTERNAL
> library types?
>
> I know TSM will dismount an idle volume if it needs a mountpoint in 3494's
> as Kent has pointed out.  I think it may behave the same way with a SCSI
> library type also.
>
> In fact, on a hunch, I just now checked my TSM 3.7 Admin Guide, Appendix A,
> External Media Management Interface Description.  The valid return codes for
> a Volume Mount Request are:
>     SUCCESS
>     DRIVE_ERROR
>     LIBRARY_ERROR
>     VOLUME_UNKNOWN
>     VOLUME_UNAVAILABLE
>     CANCELLED
>     TIMED_OUT
>     INTERNAL_ERROR
> There is nothing that indicates waiting for a mount point.  That could
> account for idle volumes not being dismounted; TSM doesn't know that the
> External Library Manager is waiting for a mount point.
>
> Alex Paschal
> Storage Administrator
> Freightliner, LLC
> (503) 745-6850 phone/vmail
>
> -----Original Message-----
> From: Kent J. Monthei [mailto:Kent_J_Monthei AT SBPHRD DOT COM]
> Sent: Monday, February 05, 2001 5:20 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: tape mount retention behaviour
>
>
> We also use ADSM 3.1.2.20 (for Solaris) with IBM 3494 Libraries and have
> observed behavior consistent with that described by Joseph in the original
> email
> - an idle mount will be immediately dismounted if/when there is another
> mount
> pending and no other drive is available.  However, we also recently dropped
> the
> mount retention from the default 60 minutes down to just 5 minutes.
>
> Under what scenarios (or rationale) does it make sense to force tapes to
> remain
> mounted more than 5 minutes after a client backup session has completed?
>
> -Kent M., GSK
>
>
>
>
>
>
> joelf AT cac.washington DOT edu on 05-Feb-2001 19:57
>
>
>
> Please respond to ADSM-L AT vm.marist DOT edu
>
> To:   ADSM-L
> cc:    (bcc: Kent J Monthei/CIS/PHRD/SB_PLC)
> Subject:  Re: tape mount retention behaviour
>
>
>
>
> I thought it always worked this way.  At one time I was going to put in a
> request to have two mount retention times.  One for when there are no
> pending request for a drive and the other for when there are pending
> request.
>
> On Mon, 5 Feb 2001, Joe Faracchio wrote:
>
> > I recently upgraded from 3.1.2.20 to 3.7.2.0
> > and notice a very annoying behaviour.
> >
> > The system keeps an idle tape mounted for the full retention period
> > specified despite the pending mounts that are waiting.
> >
> > when / where will this be fixed???
> >
> > thanks ... joe.f.
> >
> > Joseph A Faracchio,  Systems Programmer, UC Berkeley
> >
>