Have you evaluated Veritas' Database Edition?  We are in a Solaris
environment running Oracle and the DBE gives us some pretty robust options.
It does have a hefty price tag but in that environment, it sounds completely
justifiable.  I'm running Ultriums and am pleased with performance.  It's
LAN based but I'm preparing to move to direct SAN based which should give a
nice reduction to my backup window.  I would recommend continuing to look
beyond DLT as it sounds you are doing and avoid LAN based backups.

>Ok, so here is my delima.  I have more and more customers coming to me 
>saying that they have a database that is mission critical and if it goes 
>down, they need to be able to restore it very quickly, within minutes or
>few hours.  The problem is that these databases are expected to grow to
>several terabytes in the next year or so.  Backups alone will take forever,
>but the restores will be ugly.  We are using DLT's right now and are just
>starting to use SDLT's.  I use NetBackup for backups software and do not
>have the option to change off of that.  Disk base is really the only choice
>that I have to look at from here, although I am not against looking at some
>other means that will speed things up.

>Thanks,
>Rick