VFS:can't mount rootfs on "sdax" or unknown block (0,0):silly,but worked
don't listen to your livecd,it says your harddisk is sda1,sda8,sda10 or something,don't look into you /dev/,and find sda1,sda8 or something:
if you harddisk is IDE,write root=/dev/hdax in you menu.lst,don't write root=/dev/sdax,or it will stuck in booting:
VFS:can't mount rootfs _________________________
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