Found myself trying to help a friend with their linux computer which crashed.
On rebooting, there were a load of hda errors along with a kernel panic message.
The errors which looked reasonable for googling were:
pivotroot: pivot_root (/sysroot, sysroot/initrd failed:2)
umount .initrd/proc failed:2
Kernel panic: No initrd found
I've tried rebooting with the RH9 disk1 in and going into linux rescue mode, but that claims not to have found any RH9 mountable drives.
After dropping into the shell, I can mount /boot but not /
Probably a load of things, that I should try, but can't remember or find.