Just setup at new storage tape pool and force the B tape storage pool to
migrate to it by updating the nextpool, hi, and lo.
Change the nextpool for any disk pool to point to the new storage pool.  Are
you going to double density tapes or double length also.  If you are going
to double length, make sure the tape drive itself is configured to allow it.


For some reason, marking the old tapes read-only helps the process.

Jeff Bach
Home Office Open Systems Engineering
Wal-Mart Stores, Inc.

WAL-MART CONFIDENTIAL


        -----Original Message-----
        From:   Fred Johanson [SMTP:fred AT MIDWAY.UCHICAGO DOT EDU]
        Sent:   Tuesday, July 10, 2001 10:04 AM
        To:     ADSM-L AT VM.MARIST DOT EDU
        Subject:        Re: TSM and 3590E Tapes

        When we did this on AIX, every 3590B cartridge became READ-ONLY.
Depending
        on the size of your scratch pool, you can either let them migrate to
3590E
        via gradual reclamation, which you can speed along by setting a
relatively
        low reclamation value, or by run MOVE DATA on every 3590B volume you
have.


        At 10:42 AM 7/10/2001 -0400, you wrote:
        >We are running TSM 3.7.3 on OS/390 2.8.  We are getting ready to
upgrade
        >our tape drives from model B's to model E's.  IBM says that the
upgraded
        >drives will read the old tapes just fine, but will write them at
the new
        >density.  I am unable to determine what, if anything, I need to do
to
        >configure TSM for this change.  The deviceclasses only define
"3590" with
        >no model information.  The capacity information for the old density
tapes
        >will not be correct when it starts writing at the new density.  Is
this
        >something that TSM will adjust automatically or do I need to reset
it somehow?
        >
        >Are there any problems I'm not thinking of that might bite us with
some
        >tapes at the old density and some at the new, once TSM starts
writing
        >tapes with the upgraded drives?
        >
        >Anything, else I should be looking at.
        >
        >Thanks for any advice.
        >

>---------------------------------------------------------------------------
-------------------------------------
        >
        >
        >Louis J. Wiesemann
502-852-8952
        >

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