Still having trouble with tape on Dell 2450

[pgrunwald at comcast.net]

I'm still having a little trouble with the Python Drive on a dell 2450.  IT was acting really flaky and it turns out that Dell sent me an unterminated cable.  I replaced with Dell part number 8459u.

Drive is seen at boot:
dmesg
.
.
.
Waiting 15 seconds for SCSI devices to settle
aacd0: <RAID 5> on aac0
aacd0: 52067MB (106633344 sectors)
sa0 at ahc0 bus 0 target 6 lun 0
sa0: <ARCHIVE Python 06408-XXX 825B> Removable Sequential Access SCSI-3 device
sa0: 40.000MB/s transfers (20.000MHz, offset 32, 16bit)


mt status
Mode      Density              Blocksize      bpi      Compression
Current:  0x26:DDS-4           1024 bytes     97000    DCLZ
---------available modes---------
0:        0x26:DDS-4           1024 bytes     97000    DCLZ
1:        0x26:DDS-4           1024 bytes     97000    DCLZ
2:        0x26:DDS-4           1024 bytes     97000    DCLZ
3:        0x26:DDS-4           1024 bytes     97000    DCLZ
---------------------------------
Current Driver State: at rest.
---------------------------------
File Number: 0  Record Number: 0        Residual Count 0

camcontrol eject sa0 does eject the tape.

mt rewind immediatly returns as does mt retension

mt erase seems to permanently hang the system and I have needed to reboot to kill the process.

dump seems to work:
dump -0u -a -L -f /dev/sa0 /home
  DUMP: Date of this level 0 dump: Thu Nov 18 12:31:29 2004
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping snapshot of /dev/aacd0s1f (/home) to /dev/sa0
  DUMP: mapping (Pass I) [regular files]
  DUMP: mapping (Pass II) [directories]
  DUMP: estimated 1489 tape blocks.
  DUMP: dumping (Pass III) [directories]
  DUMP: dumping (Pass IV) [regular files]
  DUMP: DUMP: 1019 tape blocks on 1 volume
  DUMP: finished in less than a second
  DUMP: level 0 dump on Thu Nov 18 12:31:29 2004
  DUMP: Closing /dev/sa0
  DUMP: DUMP IS DONE

I'm having trouble with restore:

root at samba:/tmp/restore_test$ mt fsf 1
root at samba:/tmp/restore_test$ restore rf /dev/sa0
tape read error: Unknown error: 0


I was using this page as my guide: http://www.freebsddiary.org/dump-restore.php
Any suggestions?

Thanks,
P.