Orin...

There are other considerations also. How many inactive versions of files do
you plan to keep? How many deleted version do
you plan to keep. Also, how long do you plan to keep inactive and deleted
copies? Are you archiving at all with ADSM?
Are you planning to do any disaster recovery i.e. off site tape vaulting? It
could make a difference.

I would go DLT from personal exerience. Cost per tape is ~$80 depending on
vendor with 4000 drives you get 40GB, 20 Compressed.
7000's get 70GB and 35 compressed.
For administrative and growth purposes I would go with a Library over a
changer.

StorageTek has the 9730 which can hold up to 28 tapes with 4 DLT drives or
30 tapes with 3 drives.
ATL has a similiar system called the P1000.

DLT 4000 drives for these units run about $5000 or so
DLT 7000 drives run about $10000 ( they hold more data per tape )

DLT 4000's should be fine. I would think anyway.

And you thought you were asking a simple question!


C
__________________________________________________
Cris Robinson
Sr. Technical Analyst
Enterprise Storage Management / TSM (ADSM)
Liberty Mutual Insurance
Portsmouth, New Hampshire
603.431.8400.54837
mailto:cris.robinson AT libertymutual DOT com

        -----Original Message-----
        From:   Orin Rehorst [SMTP:rehorst AT POHA DOT COM]
        Sent:   Monday, November 29, 1999 10:25 AM
        To:     ADSM-L AT VM.MARIST DOT EDU
        Subject:        Tape Library Recommendation

        *       What do you recommend for an entry level library on a
limited >
        budget?
        *
        *       I'm > backing up 8 servers and about 15 users. Could go
conceivably
        up to 10 > servers and 100 users. Max storage of about 250 GB.
                >
                > A single tape drive and a small one-drive library?
                >
                > A small library with two drives?
                >
                > DLT?
                >
                > What brand and model(s)?
                >
                > TIA

        Orin Rehorst
        Port of Houston Authority
        (Largest U.S. Port in foreign tonnage)
        e-mail:  rehorst AT poha DOT com <mailto:rehorst AT poha DOT com>
        Phone:  (713)670-2443
        Fax:      (713)670-2457
        TOPAS web site: www.homestead.com/topas/topas.html