reinstall grub on f17 x64

[Adel ESSAFI]

Hello
I have a problem with booting on fedora 17 x 64
when bootingm grub prints this message

error: attempt to read or write outside of disk 'hd0'


however, when I boot with live CD I can access to all my partitions linux
and windows.

when trying to reinstall grub, i get this message,

[root at localhost ~]# grub2-install /dev/sda
/usr/share/grub/grub-mkconfig_lib: line 53:  2054 Segmentation fault
(core dumped) "${grub_probe}" -t fs "$path" > /dev/null 2>&1
Path `/boot/grub2' is not readable by GRUB on boot. Installation is
impossible. Aborting.

Could you help please




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