ADSM-L

Re: Subject: stgpool migration starts 2nd scratch tape?

1973-04-30 08:13:20
Subject: Re: Subject: stgpool migration starts 2nd scratch tape?
From: Pat Wilson <paw AT NORTHSTAR.DARTMOUTH DOT EDU>
Date: Thu, 8 Oct 1998 13:32:20 +22300919
Thanks, but *nothing* else was going on.  D0012 was dismounted
after idle time, but then remounted apparently normally.

Pat Wilson
paw AT dartmouth DOT edu

Wanda Prather writes:

>  I think this could also happen if someone tried to RESTORE from that tape
>  during the migration.
>  Something caused ADSM to dismount D0012 before the migration process was
>  done.
>
>  If D0012 was in use by another process, such as a RESTORE, the migration
>  process would then mount a new scratch tape for output, as you describe.
>
>
>  > -----Original Message-----
>  > From: John W. Stephens [SMTP:john.w.stephens AT US.PWCGLOBAL DOT COM]
>  > Sent: Wednesday, October 07, 1998 8:47 AM
>  > To:   ADSM-L AT VM.MARIST DOT EDU
>  > Subject:      Subject: stgpool migration starts 2nd scratch tape?
>  >
>  > Check to see that Collocation is not enabled for that STg pool, if
>  > collocation is set for 'yes' then during migration when the data from
>  > another client is set to migrate to your stgpool it will need to mount
>  > another tape to keep that data together .
>  >
>  > Regards,
>  > John Stephens
>  >
>  > **************************************************************************
>  > *
>  >
>  > Date:    Tue, 6 Oct 1998 11:52:21 -0400
>  > From:    Pat Wilson <paw AT NORTHSTAR.DARTMOUTH DOT EDU>
>  > Subject: stgpool migration starts 2nd scratch tape?
>  >
>  >
>  >
>  > Hmm.  Why would ADSM start a 2nd tape (during a normal stgpool
>  > migration) when the (first) tape it's been writing to is still
>  > present and enabled?  In the following log, we first write to D0012 a
>  > couple of times, then dismount it, and then _remount_ it (in the other
>  > drive), but also mount a new scratch volume (D0013) and decide to write to
>  > that.
>  >
>  > Is there some parameter I should be setting?  I'd expected everything to
>  > write on one tape (only 17GB of data, and we've got 35GB DLT tapes).
>  > D0012
>  > is now 41% full, still R/W access, and in the "filling" state.
>  >
>  > Thanks.
>  >
>  > Pat Wilson
>  > paw AT dartmouth DOT edu
>  > ----------------------------------------------------------------
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