Whereas you've verified that the write-protect tab is properly set for R/W, you need to examine your logging to see if there is one drive or multiple exhibiting the Write Protected condition. If one drive, there may be a sensor issue. If multiple, it may be a microcode defect issue. LTO5 is new, and there have been reports of firmware deficiencies. It would be healthy to render the drives offline to TSM and conduct testing of each drive, at the OS level, using a test tape of known condition.
Richard Sims
