Re: 3590 - Estimate Capacity question

[David Ehresman]

The new drives can read the old tapes, they can write the old tapes in the new denser 
format, but they CANNOT append to old tapes.  So you must either define a new device 
class as has already been suggested or at time of conversion, mark all existing tapes 
as READONLY to prevent TSM from trying to append to them.