grub restore

one time when I try to restore my grub I found this error

Due to a bug in xfs_freeze, the following command might produce a segmentation
fault when /mnt/root/boot/boot/grub is not in an XFS filesystem. This error is harmless and
can be ignored.
xfs_freeze: specified file ["/mnt/root/boot/boot/grub"] is not on an XFS filesystem
Installation finished. No error reported.
This is the contents of the device map /mnt/root/boot/boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.

(fd0) /dev/fd0
(hd0) /dev/sda


I try to fix it and at last I found these steps

load with liveCD

sudo grub

find /boot/grub/stage1

root (hd1,3)

setup (hd0)

quit

and it was solved