I might have missed this in the FAQ-O-Matic.

I have a 20 tape rotation on which I do full backups each night(I'm
backing up about 10Gb on DDS3 tapes). I got this error this morning. It
looks to me that amanda isn't overwriting DailySet100 but appending it.
With 20 full backups, I really want amanda to check for the right tape and
then overwrite it if it is the right one. How do I set this up? 

Amanda works so well that I really just feed tapes and do a amrecover once
in a while. :-)

Thanks,
Keith

A clip of my report follows:

These dumps were to tape DailySet100.
*** A TAPE ERROR OCCURRED: [[writing file: No space left on device]].
Some dumps may have been left in the holding disk.
Run amflush to flush them to tape.
The next tape Amanda expects to use is: DailySet101.

FAILURE AND STRANGE DUMP SUMMARY:
  localhost  //ntmachine/Users lev 0 STRANGE
  localhost  //ntmachine/Company lev 0 FAILED [out of tape]
  localhost  //ntmachine/Company lev 0 FAILED ["data write: Connection 
reset by peer"]
  localhost  //ntmachine/Company lev 0 FAILED [dump to tape failed]


STATISTICS:
                          Total       Full      Daily
                        --------   --------   --------
Estimate Time (hrs:min)    0:01
Run Time (hrs:min)         1:19
Dump Time (hrs:min)        0:24       0:24       0:00
Output Size (meg)         969.7      969.7        0.0
Original Size (meg)      1764.2     1764.2        0.0
Avg Compressed Size (%)    55.0       55.0        -- 
Filesystems Dumped            7          7          0
Avg Dump Rate (k/s)       682.7      682.7        -- 

Tape Time (hrs:min)        0:39       0:39       0:00
Tape Size (meg)           969.9      969.9        0.0
Tape Used (%)               9.8        9.8        0.0
Filesystems Taped             7          7          0
Avg Tp Write Rate (k/s)   426.6      426.6        --