Quantum Audio Travan 40 Tape Drive STT3401A - Manual (Page 76)

Chapter 5 ATAPI Interface
Page 68 Seagate Travan 40 Product Manual
READ process (e.g., REWIND). See REQUEST SENSE, bytes 14-15 and LOG
SENSE, Page 3.
Data Under-Run Counter: This counter is incremented each time a buffer overrun
causes the tape to reposition. The counter is cleared when the READ process is
terminated. See REQUEST SENSE, bytes 16-17.