Disk Drives Won't Read

[NASTY_LOS]

I reset my CMOS about a week ago. I just started to burn some music and movies. I would like to use all four drives to do simultaneous dubs. I finally found out how to use all four simultaneously...but now two of them won't read disks. I updated the firmware on all four drives and I'm stuck, yet again. Please help.

Any ideas are welcome!!!!