Wow, this is almost the same bug I reported a year ago, except this time it's a
slightly different tape drive.

I have a Quantum SDLT-320 drive.  mt does not know the density code for the
drive in 160GB naitive mode:

> mt -f /dev/nst1 stat
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x49 (no translation).
Soft error count since last status=0
General status bits on (41010000):
 BOT ONLINE IM_REP_EN

I downloaded mt-st-0.7-8.src.rpm from Rawhide and rebuilt it on this machine; it
doesn't know the code either.

The following patch does the trick:

--- mt.c.orig   Fri Feb 21 17:01:05 2003
+++ mt.c        Fri Feb 21 17:01:16 2003
@@ -221,6 +221,7 @@
     {0x45, "QIC-3095-MC (TR-4)"},
     {0x47, "TR-5"},
     {0x48, "Quantum SDLT220"},
+    {0x49, "Quantum SDLT320"},
     {0x80, "DLT 15GB uncomp. or Ecrix"},
     {0x81, "DLT 15GB compressed"},
     {0x82, "DLT 20GB uncompressed"},