bus error & core dump on programs after using cdrecord

Hello,

I have a problem which seems to be related to cdrecord and/or scsi cd 
emulation.
I recently compiled a kernel with scsi emulation options, as stated in 
freebsd handbook, for using cdrecord.
After I write/erase a CD-R/RW it happens very often that programs give 
me a bus error and core dumps. This happens even for "ls". If I do for 
10 times a ls command, at least once it generates a bus error and core 
dumps.
And it happens for other programs too, but only after I use cdrecord.
This problem does not apear after I use "burncd".

My computer is a Celeron 800mhz, 256sdram, msi mb with i815 chipset, wd 
80gb p-ata hdd, and teac cd-rw 52x32x52x.
If you need any other information for clearing this situation please let 
me know.

Another thing would be about the ata-master: TIMEOUT SETFEATURE error.
The problem still apears for me, even with 5.2.1 update, but only if I 
boot freebsd with teac's tray opened.

Thank you.


-- 
Claudiu Dragalina-Paraipan
e-mail: clau_at_reversedhell.net