DVD burner - not burning correctly?
 

EDIT: I bought new media and that solved my problem.

I have an external DVD burner. I'm able to read DVDs that other people write, but when I try writing a DVD using k3b on Linux or Roxio on Windows it says it finishes correctly but is unreadable in either operating system. When I selected varify in k3b and it said "Writing successfully finished. Unable to read Iso9660 Filesystem." The results are the same regardless of the writing speed.

Using a disk I didn't write:

eric@DataStream:~$ sudo mount /dev/sr0 /media/dvd
mount: block device /dev/sr0 is write-protected, mounting read-only
eric@DataStream:~$ ls /media/dvd/
AUDIO_TS VIDEO_TS

Using a disk I wrote:

eric@DataStream:~$ sudo mount /dev/sr0 /media/dvd
mount: No medium found

The drive is Pacific Digital 8x8 USB DVD DUAL.

The disks are DVD+R 8x (and I've wasted quite a few of them :().

K3b debugging output:

System
-----------------------
K3b Version:0.11.15cvs
KDE Version: 3.3.0
QT Version: 3.3.3

growisofs
-----------------------
INFO: UTF-8 character encoding detected by locale settings.
Assuming UTF-8 encoded filenames on source filesystem,
use -input-charset to override.
/dev/sr0: "Current Write Speed" is 4.1x1385KBps.
6.19% done, estimate finish Tue Jul 26 08:29:29 2005
12.17% done, estimate finish Tue Jul 26 08:28:50 2005
18.05% done, estimate finish Tue Jul 26 08:28:37 2005
24.07% done, estimate finish Tue Jul 26 08:28:30 2005
30.14% done, estimate finish Tue Jul 26 08:28:26 2005
36.25% done, estimate finish Tue Jul 26 08:28:23 2005
42.08% done, estimate finish Tue Jul 26 08:28:21 2005
48.20% done, estimate finish Tue Jul 26 08:28:19 2005
54.12% done, estimate finish Tue Jul 26 08:28:18 2005
60.11% done, estimate finish Tue Jul 26 08:28:17 2005
66.15% done, estimate finish Tue Jul 26 08:28:17 2005
72.24% done, estimate finish Tue Jul 26 08:28:16 2005
78.30% done, estimate finish Tue Jul 26 08:28:15 2005
84.24% done, estimate finish Tue Jul 26 08:28:15 2005
90.26% done, estimate finish Tue Jul 26 08:28:15 2005
96.19% done, estimate finish Tue Jul 26 08:28:14 2005
Total translation table size: 0
Total rockridge attributes bytes: 4747
Total directory bytes: 8192
Path table size(bytes): 26
Max brk space used 0
8318 extents written (16 MB)
/dev/sr0: flushing cache
/dev/sr0: closing track
/dev/sr0: closing disc

growisofs comand:
-----------------------
/usr/bin/growisofs -Z /dev/sr0 -use-the-force-luke=notray -use-the-force-luke=tty -use-the-force-luke=dao -dvd-compat -speed=4 -gui -graft-points -volid K3b data project -volset -appid K3B THE CD KREATOR VERSION 0.11.15cvs (C) 2003 SEBASTIAN TRUEG AND THE K3B TEAM -publisher -preparer K3b - Version 0.11.15cvs -sysid LINUX -volset-size 1 -volset-seqno 1 -sort /tmp/kde-eric/k3bun3Etb.tmp -rational-rock -hide-list /tmp/kde-eric/k3bWg5TJa.tmp -full-iso9660-filenames -iso-level 2 -path-list /tmp/kde-eric/k3bMCkR3a.tmp