SCSI Meltdown!!!

[arcsecant]

I have a Yamaha CRW8424SZ CD Writer and a Pioneer DVD 305S DVD-ROM connected to my Adaptec AHA-2940U2W SCSI Host adapter. Today, I encountered a strange problem. When I booted the computer, I could not get the SCSI BIOS to detect any of my SCSI devices (My SCSI devices are the Yamaha, Pioneer, and a Fujitsu hard disk). So I start disconnecting devices to see what is the problem. After disconnecting my Yamaha drive, the computer booted. Actually, I wasn't too surprised that the Yamaha failed because about a week ago, Windows started to complain that I had unsafely removed the drive from the computer. However, now my Pioneer drive doesn't work either. Windows detects it, and claims it is working properly, but when I insert a CD, it just spits it back out at me.

Anyone have any ideas?
Thanks!

 

[foofoo]

this sounds like classic termination problems.
how is your chain terminated?
do any of the peripherals in the middle of the chain have a terimation jumper that is on?
is the boot hd scsi address 0?
these are the first things to check.
good luck