>> On Wed, 13 Jun 2007 08:43:43 -0400, "Johnson, Milton" <[EMAIL PROTECTED]> >> said:
> The VTL is a Sepaton S2100-ES and yes it is disk only. > I don't see the benefit that a "tape backed" system would bring, how > does that really differ from a physical tape ATL with TSM providing > a DISKPOOL front end? Well, exactly. :) But the distinction I wanted to make clear was: if you've decided to store all your data on disk, then TSM has all the primitives necessary to make that disk manageable, and you can discard the intermediate appliance that makes the disk pretend to be a bunch of tape drives. That's what everyone's getting at when they talk about FILE devclasses. So if you bought 23 TB of slow disk plus a pretend-im-tape-box, then the tape box was a waste, if you're using TSM. If you're using something without TSM's volume primitives, it could be extremely important. - Allen S. Rout
