ADSM-L

Re: Moving from single length to extended length 3590 cartridge t apes.

2000-08-29 15:54:47
Subject: Re: Moving from single length to extended length 3590 cartridge t apes.
From: bbullock <bbullock AT MICRON DOT COM>
Date: Tue, 29 Aug 2000 13:54:45 -0600
        Woah, woah woah, I think you are talking 2 different things here.

        I believe the question being asked is "Can the single length 3590
tapes (denoted by a 'j' on them) co-exist in a library with the new extended
length tapes (denoted by a 'k' on them)?" I believe that the answer is yes,
as long as your tape drives are the 3590E drives. The 3590E tape drives will
know the length of the tape when it mounts it (because of the little colored
tabs below the label) and write it correctly. The 3590E writes out 256
tracks regardless of the tape length.

        I believe that the question you have answered is, "How do I go about
upgrading my 3590B or 3590Ultra drives to the 3590E drives and use the same
tapes?" In this case, there is a difference in the number of tracks it is
writing and the procedure that is described below is valid.

        We have upgraded to the 3590E drives but have yet to put in any of
the extended length tapes to test this theory, so I'm not 100% sure of this,
but that is the way IBM has explained it to us.

Thanks,
Ben
Micron Technology

> -----Original Message-----
> From: Ilja G. Coolen [mailto:ilja.coolen AT ABP DOT NL]
> Sent: Tuesday, August 29, 2000 1:22 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Moving from single length to extended length
> 3590 cartridge
> tapes.
>
>
> Yes you can, but you need to upgrade to at least 3.1.2.50. We
> needed to do
> so. Lower levels will not be able to use the extended length feature.
> But when you use both tape lengths at the same time you have to do the
> following first, or else you will end up having many
> read/write errors. This
> is because the difference in number of tracks.
>
> 1. update all single length tapes to access=reado
> 2. move alle data of all single length tapes to scratch tapes.
> 3. update all tapes back to access=readw
>
> The tape drives will not be able write 256 tracks on a 128
> tracks tape.
>
>
> -----Oorspronkelijk bericht-----
> Van: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU]Namens Irene
> Braun
> Verzonden: dinsdag 29 augustus 2000 20:00
> Aan: ADSM-L AT VM.MARIST DOT EDU
> Onderwerp: Moving from single length to extended length 3590 cartridge
> tapes.
>
>
> We are currently using single length 3590 cartridge tapes and
> would like
> to move to using extended length tapes.  We are running ADSM
> 3.1.2.40 on
> AIX.
> Can the two different tape length types co-exist in ADSM and
> if so how can
> this be accomplished?  Does it entail defining a second
> virtual library with
> a separate device class etc.  Would it be simple to manage?  Is there
> any
> online documentation discussing this procedure?
> Thanks,  Irene
> EMAIL:  irene.braun AT ualberta DOT ca
>
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