Hi
I have 10 datasafe -rw medi 2x the problem is that my drive no longer reconizes 3 of them

the drive is the pioneer dvr 107d

it was ok till i change the firmware to the hacked 113 for 8x after that it failed to pick up 3 of the discs

The drive pick them up ok till nero erase what was on the disc before attempting to write new data to them thn nero 6 ulta report no media in the drive

ive put the firmware back to the offical 115e and the burn as improved but still fails to pick up these 3 disc

i also tried to erase or format them in dvd info pro but that fail to pick up the disc as well
the other 7 disc are pick up ok by the drive but i`m worry that if i delete the information on them will i be able to write to them after
anybody know a way to make the drive reconize these disc
i have clean them and try them in my dvd -rom as well
hope someone can help