I ran this dump (as root) and got the following.............
# ufsdump 0f /dev/rmt/0n /
DUMP: Writing 32 Kilobyte records
DUMP: Date of this level 0 dump: Tue 11 Dec 2007 06:07:35 AM PST
DUMP: Date of last level 0 dump: the epoch
DUMP: Dumping /dev/rdsk/c2t1d0s0 (gambler:/) to /dev/rmt/0n.
DUMP: Mapping (Pass I) [regular files]
DUMP: Mapping (Pass II) [directories]
DUMP: Estimated 3192762 blocks (1558.97MB).
DUMP: NEEDS ATTENTION: Cannot open `gambler:/dev/rmt/0n'. Do you want to retry the open?: ("yes" or "no") no
DUMP: The ENTIRE dump is aborted.
Here is the mt status result...........
# mt -f /dev/rmt/0 status
Archive Python 4mm Helical Scan tape drive:
sense key(0x7)= Write Protected residual= 0 retries= 0
file no= 0 block no= 0
I'm currently running 5.8. I don't now why I'm getting the "Cannot open `gambler:/dev/rmt/0n'"................