I posted a similar question several weeks ago but at that time it appeared
that the issue was a faulty system disk. I have replaced the drive and
reinstalled XP again for the umpteenth time and the issue is back. Details
follow:

I have a LiteOn CD writter (IDE 1, master) and a Memorex DVD writter (IDE 1,
slave) on the computer. Both drives worked properly before I started having
system disk issues. Both drives also show up as working properly in the
device manager and I've "uninstalled" the LiteOn and let windows reinstall it
using the MS drivers. Prior to the uninstall/reinstall it worked one or two
times reading a CD for use in installing a program. I've run CDCHECK on both
drives and gotten back an error 21 (not ready) for both. I suspected NIS 2008
might be an issue but I get the same results in safe mode.

Any thoughts on how to get either drive working would be greatly appreciated.

Thanks
Zoltan