>If LTO2 drives can read LTO1 tapes (I don't know, we went the
>DLT->SuperDLT route), then the upgrade should be easy.

We did extensive testing with our DR site. The conclusion was that LTO2
drives not only read LTO1 tapes, but they read them 1.5 to 2 times faster
than LTO1 drives.

YMMV. I strongly suggest testing this in your environment, with your
existing LTO1 drives and LTO2s from the manufacturer you are planning to
use for production. All indications are you should have smooth going.

Regards,

Conrad Macina
Pfizer, Inc.


On Thu, 4 Sep 2003 13:53:35 -0500, Tim Mooney
<mooney AT DOGBERT.CC.NDSU.NODAK DOT EDU> wrote:

>In regard to: [Networker] Mixed media considerations, Itzik Meirson
said...:
>
>>We are about to outgrow our current 10*LTO1 650 slots jukebox.
>>
>>We are considering swapping most of the drives to LTO2 but need
>>coexistence of LTO1 and LTO2 for about a year.
>>
>>I would appreciate any viable recommendations as Networker is not easily
>>coping with mixed media jukeboxes.
>>
>>We would also like to make this LTO1 to LTO2 transition as smooth and
>>seamless as possible...
>
>If LTO2 drives can read LTO1 tapes (I don't know, we went the
>DLT->SuperDLT route), then the upgrade should be easy.
>
>When we upgraded our STK9710 jukebox from DLT7000 drives to SuperDLT1
>(220) drives, I just
>
>- deleted the jukebox definition
>- reran jbconfig, and told it that drives 1 through N-1 were type
>  "SuperDLT".  For the last drive, I told jbconfig that it was type tz89
>  (DEC/Compaq/HP's name for DLT7000, though there are slight differences
>  like default blocksize, they're primarily compatible).
>
>
>- I also made drive N "ReadOnly", and modified each of our local pools
>  to prefer SuperDLT media.
>
>
>It's been working flawlessly for more than a year.  Once we no longer need
>to be able to read any tapes that are type "tz89", I'll delete the jukebox
>again and recreate it with all drives defined as "SuperDLT".
>
>Legato may not support this type of "mixed media" configuration, though.
>
>Tim
>--
>Tim Mooney                              mooney AT dogbert.cc.ndsu.NoDak DOT edu
>Information Technology Services         (701) 231-1076 (Voice)
>Room 242-J6, IACC Building              (701) 231-8541 (Fax)
>North Dakota State University, Fargo, ND 58105-5164
>
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