I'm not sure what made this happen to my FC4 partition (hda6) after a yum install. My pc got all weird and wouldn't do another yum install or recognize my root password. Then I noticed that a bunch of processes were running (124 and I usually have 80). I didn't notice a single program that was taxing my cpu so I rebooted.
On reboot, my pc could not find grub. I booted with a Win98 boot disk and typed fdisk /mbr and that seemed to restore grub. Now when it boots, I get to grub and select FC3 (hda2). It starts up but notices an error on my FC4 partition (hda6) and tries to fix it but cannot and then drops me to a maintanence line where I type in a password. I typed in fsck /dev/hda6 and then let it repair my disk all night. When I came back, it was still repairing....so I hit CTRL-C to stop it and then typed shutdown -r now.
When it rebooted, I got the same thing. I'd like to be able to at least use my old FC3 partition which has most of the data.
This is the error I get after I select FC3 (hda2)
Buffer I/O error on /dev/hda6: logical block 0 through 12