I have an Adaptec 2940U/2940UW scsi adapter, and 2 drives connected to it:1) toshiba 6401 X40 cd-rom and 2)hp internal cdwriter (9210i). They worked just fine, and just recently the problem started.
When I start windows 2000 (I have dual boot), windows only shows the hp cd-writer, and the toshiba is not listed in the device manager. If I ask win2000 to search for new devices, the toshiba cd-rom suddenly appears.
If I don't try to search for new hardware, and just diable the HP and then enable it, windows 2000 again finds the toshiba.
The funny thing is that in win 98 there is no problem, and I tried to solve to problem in win 2000 by updating the adapter driver (and it didn't work).
Also I read in adaptec site that in the computer bios the option of "PNP OS" should be disabled, so I disabled it, and it didn't sove the problem.
The toshiba, or the HP doesn't have any special drivers so it isn't the problem eather.
What is causing the problem and how do I solve it?
P.S. I have an Athlon 850Mhz with gigabyte 7IXE motherboard with the last biost update, and 256 mb or ram.
There is another scsi adapter on my computer that came with my scanner and I pluged it because if I install the scanner (umax) program without having the scsi adapter pluged, I get a blue screen when I start win98 (this problem is known and written in Umax site).
I don't think that the scaner scsi adapter has anything to do with the problem I have. I Also downloaded a new bios for the adaptec scsi adapter but I'm not going to instal it because my friend did it with his adapter and it "Killed" it.