i did search, and didnt find anything releavant. i burn a backup from a partition on my drive, so i open k3b and select new data dvd project... i put in the dvd+r, i select the files, i click burn, and it burns with all defaults. SUCCESS!! then i put the disc back in and run mount /mnt/dvd and it cant read the superblock.. i am using auto for the filesystem in fstab, ido have udf support in the kernel, i do have new versions of dvd+-rw tools, i have packet writing enabled in the kernel. i also tried different values in k3b, all kinds of them... still no luck, sometimes wont even burn. ( like if i say discatonce, it just says no medium, then dvd+r (empty) but wont write). i cant figure this out. i put it in a windows computer, and nothing. there are no files. if i put the same disc into the drive adn start up k3b, it says it is blank. what am i doing wrong. i am running slackware 10.2, and i am not a newb... i dont think....

EDIT: i didnt mention, i am running 2.6.13.2, but i do have ide_scsi in it, for dvddecrypter with wine, but it is modular, and i am not loading it, and i dont have ide-scsi in my grub... could that be causing it....???

Did you try mounting the device? e.g.

mount /dev/hdc

2.6.x kernels use ide-cd for burning, and it's builtin so no emulation is needed, except select cases like yours with the wine thing. But that shouldn't cause any problems.

yeah, i tried mounting it with the fstab with mount /mnt/dvd then i tried mount -t udf /dev/hdc /mnt/dvd i also tried auto as type... nothing will mount, just says bad superblock... so, hm.. i do know that ide-cd is built in, well you can option it out, but yeah.. i know you dont need ide-scsi anymore with 2.6 kernels, and they are solid, and all that.... i just did it for the wine thing, but i figured well il recompile without it just in case, so i did.. i havent tried it yet. appearently i had the clockmod set to 175mhz (cause i was playing) and it took a long time and i was asleep.. ill try it when i get back, and post wheather or not it helped.,, but i dont think it will matter. got any other ideas.. do you think it is hardware. .... i dontknow.

I've been having trouble with this for a while too.
Try removing the packet device:
# pktsetup -d 0

This allows me to mount the dvd

ps. or for Debian:
# /etc/init.d/udftools stop