Dump and Restore don't seem to agree about the correct
format of a dump tape.
alien9 /mnt/hdc1 # dump 0f - / | restore rf -
DUMP: Date of this level 0 dump: Mon May 24 00:18:04 1999
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/hda1 (/) to standard output
DUMP: mapping (Pass I) [regular files]
DUMP: mapping (Pass II) [directories]
DUMP: estimated 604266 tape blocks.
DUMP: dumping (Pass III) [directories]
Tape is not a dump tape
DUMP: Broken pipe
DUMP: The ENTIRE dump is aborted.
Fixed in dump-0.4b4-9. This problem is/was a compiler problem.