Undetected HDD's, freeze ups

[DVOM]

I've been getting intermittent problems with undetected hard drives at boot up. First it can't detect my primary HDD, when I choose to continue anyway it doesn't detect the secondary HDD.

I've also been getting intermittent freeze ups while in windows. So I checked the system event viewer and found several disk errors (ID 11) that I sent to M$ who gave me the info in the attachment.

I'm also getting an "atapi" error (ID 15) at the same time as the disk errors.

As suggested in the attachment I've already replaced the IDE cable. It hasn't fixed the problem.

So I'm thinking it's a problem with the IDE controller.

Any thoughts or suggestions would be appreciated.

TIA

Edit: Another thing that's happened is once at bootup 2 days ago I got a "CMOS/GPNV checksum bad" error.