My system: Tyan K8W 2875 dual-Opteron 242 with 200GB RAID1 on 3Ware SATA 8006-2LP. I performed a clean FC3 x86_64 install on this machine some months ago without a hitch.
My attempt at FC4 upgrade (both DVD and CD) fails very early in the process. Right after reading IDE devices I get "VFS : Unable to mount root fs on 00:00" kernel panic. It never gets to the mediacheck option or deriver detection. It looks a lot like the FC1 problem described in this 3Ware KB article:
....but I'm trying to find a solution that is less complicated
Specifying "linux dd" (to give it a 3Ware driver) doesn't seem to matter -- it never got that far -- just kept going to the post-IDE point that it died.
At one point I plugged in a USB hard drive that had complete ext2 /, /boot, and /var on it and the install continued -- got to the mediacheck dialogue and found the 3w-xxxx.o driver and all, but it then complained about duplicate /, /var, etc. Sooo, it does seem like the "can't create a ramdisk" problem mentioned in the 3ware link, but is it because of no 3ware driver? The "dd" option never gave me a chance to supply driver.
Heh, a little more Google.... I wonder if problem is GRUB label problem as described here:
I am not at home now so I can't check. I'm posting not so much because I expect an easy answer but figure that if I can fix this, the answer might help the next poor sod who searches on "FC4 3Ware install panic"!