losing dvd medias with k3b/growisofs

[Frederico Rodrigues Abraham <devotion97@gmail.com>]

    Hi. I every once in a while lose dvd medias with k3b (growisofs)....
I wonder what is wrong... is it my writer, is it the software, is it the
media?
    For your information:
    - I am using one of the best medias available here (in the opinion
of all my friends who burn dvds a lot, RIDATA);
    - I am using a well known dvd burner, the LG "HL-DT-ST DVDRAM
GSA-4082B" burner
    - My computer is almost completely idle when i burn dvds

    :(
    Please help... the log with the error ocurred in growisofs is below...
    -- Fred

growisofs
-----------------------
Executing 'builtin_dd if=/home/cdrom/2.5.men.iso of=/dev/scd0 obs=32k
seek=0'
/dev/scd0: "Current Write Speed" is 4.1x1385KBps.
:-[ WRITE@LBA=1230h failed with SK=5h/ASC=21h/ACQ=02h]: Invalid argument
:-( write failed: Invalid argument
/dev/scd0: flushing cache
/dev/scd0: updating RMA
/dev/scd0: closing session

growisofs comand:
-----------------------
/usr/bin/growisofs -Z /dev/scd0=/home/cdrom/2.5.men.iso
-use-the-force-luke=notray -use-the-force-luke=tty -speed=4