i've got "new" DDS-1 tape drive with compression. i started dump with -a
option (autodetect end of tape). what i've got was

  DUMP: write error 2876544 blocks into volume 1
  DUMP: Do you want to restart?: ("yes" or "no") no


instead of "insert next volume"

while dmesg shows:

st0(adv0:6:0):  Check Condition on CDB: 0x0a 00 00 80 00 00
    SENSE KEY:  Recovered Error
                EOM Detected
   INFO FIELD:  32768
     ASC/ASCQ:  End-Of-Partition/Medium Detected
         SKSV:  Actual Retry Count: 2


- looks OK

so why it doesn't work?