If by "tapepool", you mean storage pool, then I don't think so.  A storage
pool must be associated with one and only one device class.  Each tape
volume has an associated device class.  Your existing LTO2 tapes probably
use a device class with a format of "ULTRIUM2C", which allows the highest
capacity plus compression.  When you introduce LTO3, you will probably want
to use a device class with a format of "ULTRIUM3C", to take advantage of
LTO3's higher density.  You will need a new storage pool (or pools) to hold
your LTO3 tapes.

It is (apparently) possible to update the device class with a new format...
at least the help for the update devclass command implies it...  but I
don't know what would happen to an LTO2 tape with ACCESS=READWRITE if its
devclass was updated to ULTRIUM3C format...  and I wouldn't risk trying it.

Whether or not your library can support mixed media is another question
altogether.  Some libraries can handle it seamlessly (like STK L700), and
other need to be partitioned into logical libraries with each partition
dedicated to the different media types.

Robin Sharpe
Berlex Labs



             Bill Dourado
             <bill.dourado@ALS
             TEC.COM>                                                   To
             Sent by: "ADSM:           ADSM-L AT VM.MARIST DOT EDU
             Dist Stor                                                  cc
             Manager"
             <[email protected]                                     Subject
             .EDU>                     TAPEPOOL made up of mixed LTO2 &
                                       LTO3 media

             02/21/2007 06:57
             AM


             Please respond to
             "ADSM: Dist Stor
                 Manager"
             <[email protected]
                   .EDU>






Hi,

We are about to replace our  all  HP LTO-2 tape drives by  LTO-3,
in our NEO 4000 library.

My question is,  seeing the new drives can read and write both LTO-2
and LTO-3 media,   can any given  existing tapepool be made up of
both LTO-2 and LTO-3 media ?

My problem is that I don't have enough tape slots in the library and
don't want to introduce a large number of LTO-3 tapes in one go.

Also a few of our LTO-2 tapes are fairly new and it would be a shame
to write them off.

(TSM  Server for Windows 5.3)

Thanks

Bill



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