My computer was working this morning and both hard drives were working fine, then all of a sudden for about two hours I was stuck with this "problem", then after fumbling and moving and stablizing things, then Windows works? See below for details.

I've finally reinstalled both hard drives, but the one with the Linux partition doesn't work: it says nothing is discovered on the disk. I can't login at the LUKS login after grub starts, therefore I can't get into Linux, but Windows works?!
I used to be able to go directly into Grub when the computer starts, I forgot how to do that but it doesn't matter. If you need details I'd be glad to provide them. I just wondered why Linux doesn't work, but Windows does. I have Linux & Windows on two different separate hard drives. Thanks.

I'm a little confused.... Are you saying that GRUB will NOT load? When you say you reinstalled the drives do you mean physically unplugged them and plugged them back up? or do you mean you reinstalled the OS to the drives?

From what I'm understanding, it sounds like GRUB has been overwritten by the Windows Boot Manager. But like I said, I'm not quite understanding what your asking

If you unplugged the drives, then check all your connections.

Be aware that, unless you've installed a Windows device driver, Windows will report that your Linux drives are "Unformatted," and offer to destroy the contents of all partitions on the Linux drive.

Be aware also that that driver will not "see" any partitions that are inside a logical volume, and the Fedora 9 default was to create a logical volume and to install to it.

Finally, be aware that Fedora 9 is no longer a supported distribution. (The only currently supported Fedora versions are Fedora 11 and Fedora 12. Support for any Fedora release is terminated one month after a release numbered 2 or more greater then it is made, and F12 was released last November.)

And a minor point. The "core" part of the Fedora distribution name was removed in, IIRC, Fedora 7. (The Fedora developers still use FC in some file names, but what do they know, eh?)

I'd suggest you get one of the live CD rescue disks, e.g., like the SystemRescueCD, and see what you can find out after you burn the ISO image to a CD and boot from it. (Or, if you use the SystemRescueCD, you can create a bootable memory stick you can use. Other rescue disks may have similar outions.)

You should also be able to use the Fedora install media: boot from it and enter

linux rescue

at the initial text prompt.

Have you changed boot order in bios???? Or swapped the drives master/slave arrangement?
Because it sounds as if you're not booting from grub, but the windows loader.

When I first started playing with linux, I had 2 hardrives. Windows installed on the master and linux on the slave. Then set bios to boot off the slave. That way I could set grub to boot everything, but if I stuffed up, windows was still there if I changed boot order back to master.

I just upgraded the system to FC12. Thanks to all.