On Mar 12, 2008, at 10:24 AM, William Boyer wrote:
... What just isn't connecting is how does TSM know a regular scratch tape from a WORM scratch tape? ...
Good question. The TSM manuals leave that unexplained. The redbook "Implementing IBM Tape in Unix Systems" provides some insight...
"Because Tivoli Storage Manager can distinguish between WORM and R/W cartridges (assigns “media type” of 412 for WORM cartridges and 411 for R/W cartridges at the time of check-in), you can have both WORM and R/W cartridges in a single logical library just by defining device classes, one with WORM=yes and the other with WORM=no."
There are some things which TSM knows "under the covers". Media type is revealed in the output of the Query LIBVolume command.
Richard Sims at Boston University
