Have a Dell Dimension 9100 system with one IDE port on motherboard (IDE primary). Attached to that I had a CD-ROM jumpered as master at the end of my IDE cable, and a CD-RW jumpered as cable select at the 2nd connector. Everything works.
I replace the CD-RW with a DVD-RW but leave the config the same, and make sure the DVD-RW is jumpered as a secondary. Can’t see the DVD-RW, by which I mean BIOS isn’t seeing it as a PATA device.
I proceed to try every possible primary/secondary/CSEL configuration and discover that only the primary device is being seen by BIOS. Thought it might be a driver or compatibility issue but the DVD-RW works just fine when it’s the primary. If I re-cable and re-jumper, now I lose the DVD-RW and see the CD-ROM again.
DVD-RW is an LG GH22LP20. I think I’ve eliminated jumper settings and IDE cable problems because I can get either drive, just not both, to work.
Any ideas what this would be? Thx.
