On Dec 10, 2004, at 10:28 AM, Post, J. wrote:

...After upgrading the TSM server (WIN2K,SP4) from 5.2.2.2 to
5.2.3.0 the reclamation for our COPYPOOL_COLL reports unreadable
 files, sometimes even before it has accessed any tapes ...

Unreadable files result from difficulties in reading a volume,
either because the media has marginal areas or because of issues
with the read head on the drive (e.g., dirty).  Try repeating on
another drive.  Query CONTent will then show what's problematic
on the tape.  Tape drive microcode levels sometimes affect tape
handling and might exacerbate I/O errors.

   Richard Sims