Exabyte and file positioning...

[Felix Ingrand]

We are running 4.0.3 on a Sun-4/280.  Our Exabyte is on the SCSI port
using the driver rst0. It looks like we are having some troubles with the
file positioning on the tape. We are only using nrst0, and we are doing
the following:

tar xf /dev/nrst0
mt -f /dev/nrst0 rew
mt -f /dev/nrst0 fsf 1
dump 4dsbf 54000 6000 100 /dev/nrst0 /dev/...

And the dump fail with the following error:
  DUMP: mapping (Pass I) [regular files]
  DUMP: mapping (Pass II) [directories]
  DUMP: mapping (Pass II) [directories]
  DUMP: estimated 8542 blocks (4.17MB) on 0.00 tape(s).
  DUMP: dumping (Pass III) [directories]
  DUMP: dumping (Pass IV) [regular files]
  DUMP: Media write error 4 feet into volume 1

and the st driver says:

Jun  5 13:22:43 sunset vmunix: st0:  illegal command
Jun  5 13:22:43 sunset vmunix: st0:  failed cmd =  a  0  0  c8  0  0  
Jun  5 13:22:43 sunset vmunix: st0 error:  sense key(0x5): illegal request
Jun  5 13:22:43 sunset vmunix:            sense = 70  0  5  0  0  0  0  12  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  22  f3  99  0  0  
Jun  5 13:22:43 sunset vmunix: 

Felix