We are running TSM 3.7.3 on OS/390 2.8.  We are getting ready to upgrade our 
tape drives from model B's to model E's.  IBM says that the upgraded drives 
will read the old tapes just fine, but will write them at the new density.  I 
am unable to determine what, if anything, I need to do to configure TSM for 
this change.  The deviceclasses only define "3590" with no model information.  
The capacity information for the old density tapes will not be correct when it 
starts writing at the new density.  Is this something that TSM will adjust 
automatically or do I need to reset it somehow?

Are there any problems I'm not thinking of that might bite us with some tapes 
at the old density and some at the new, once TSM starts writing tapes with the 
upgraded drives?  

Anything, else I should be looking at.

Thanks for any advice.

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Louis J. Wiesemann                                             
502-852-8952Louis J. Wiesemann                                             
502-852-8952

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