Ftape: Where did my file go?

[Michael Gersten]

After doing a dump (by tar) to /dev/nrft0, and (several hours later,
in the morning) doing an mt rewind, (and hearing the 7 passes at
the start of the tape), the tape appears empty; 'mt seod; mt tell'
reports block zero, 'less -f /dev/tape' reports empty.
(yes, /dev/tape is symlink'd correctly).

Version 3.04d, redhat 6.0.
(Please CC me directly, I'm not on this list)