The weirdest thing I have ever saw happened today after i rebooted my server.
I have an IDE drive with fedora core 12 installed.

I have 4 500g sata drives that I made a FD partition on.

Created the raid using mdadm and had a sh script that assembled and mounted

This worked just fine for 4 days and about 6 reboots.
then the other day I noticed an odd amount of net traffic coming in and out of the box and took it down to do some router configuring.

After I brought it back up and ran the sh script, I got a weird error, /dev/sdc device was busy. . . . so I did an fdisk /dev/sdc, and sure enough it had a swap space and boot partition.

so . . .I deleted em, rebooted and now I'm stuck at the grub screen.
Somehow my drive names got fubared and I don't know how to recover my system.
Any ideas?

From which disk did you boot originally? sda?

Must have been, you can't boot from a RAID5.

Boot from a live CD, find out which drive holds your boot and swap. Find the UUID's, and change GRUB's menu.lst to use UUID's instead of device names.

http://www.unixtutorial.org/2008/05/ubuntu-uuid-how-to/

Chances are that sda became sdc, and you deleted boot and swap from your boot disk thinking it was one of your RAID disks.

Reinstall, use udev to identify your disk correctly, and use UUID's as explained above.

jlinkels