Alan Brown wrote:
> On Wed, 21 Jan 2009, Ryan Novosielski wrote:
> 
>> Media type is completely arbitrary. If you want the new drive to be able
>> to share media with the old drive, you should use the same media type.
>> If not, you should have them be different. It would be best if you could
>> make a supported media type list, to allow for backward compatible
>> drives, but that's not possible at present.
> 
> This is something I raised at least 2-3 years ago. There's been no
> apparent interest in solving the issue and likely won't be until one of
> the developers encounters the problem.
> 
> Supported media lists would have to cover r/w and ro support:
> 
> LTO drives are r/w compatible with the previous generation, but read only
> with the one before that.
> 
> ie: LTO4 can R/W LTO3 tapes, but only read LTO2 and can't read LTO1 at all.
> 
> (As far as I can tell these are _minimum_ specs for LTO. It's perfectly
> possible to exceed them and produce a LTO4 drive which can write LTO2 and
> read LTO1, but as far as I know no manufacturer has done that yet.

Sure about that?, the marketing material I've seen shows only read-only
capabillity one-generation back and write capabillity one generation, if
the tape was un-used before (never written before).


-- 
Jesper

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