Ill post the output of

/usr/sbin/grub-probe --device-map="/boot/grub/device.map" --target=fs -v /boot/grub

I resized the partition to be from sector 2048 to 976772000 (of 976773168). 

/usr/sbin/grub-probe: info: cannot open `/boot/grub/device.map'.
/usr/sbin/grub-probe: info: Scanning for dmraid_nv RAID devices on disk hd0.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Scanning for dmraid_nv RAID devices on disk hd1.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: Scanning for dmraid_nv RAID devices on disk hd2.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: Scanning for dmraid_nv RAID devices on disk hd3.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: Scanning for dmraid_nv RAID devices on disk hd4.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: scanning hd0 for LVM.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: scanning hd1 for LVM.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: scanning hd2 for LVM.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: scanning hd3 for LVM.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: scanning hd4 for LVM.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk lvm-data.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk lvm-swap.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk lvm-root.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd0.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Found array md0 (mdraid09).
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd1.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd2.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd3.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd4.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk lvm-data.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk lvm-swap.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk lvm-root.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd0.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd1.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd2.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd3.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd4.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd0.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Found array md0 (mdraid09).
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd0,msdos1.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd1.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd1,msdos1.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd2.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
error: found two disks with the index 3 for RAID md0.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd2,msdos1.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd3.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
error: superfluous RAID member (4 found).
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd3,msdos1.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
error: superfluous RAID member (4 found).
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd4.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
error: superfluous RAID member (4 found).
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid09 RAID devices on disk hd4,msdos1.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
error: superfluous RAID member (4 found).
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk md0.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk md0,msdos1.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd0.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd0,msdos1.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd1.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd1,msdos1.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd2.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd2,msdos1.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd3.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd3,msdos1.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd4.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: Scanning for mdraid1x RAID devices on disk hd4,msdos1.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: scanning md0 for LVM.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: scanning md0,msdos1 for LVM.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: scanning hd0 for LVM.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: scanning hd0,msdos1 for LVM.
/usr/sbin/grub-probe: info: the size of hd0 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: scanning hd1 for LVM.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: scanning hd1,msdos1 for LVM.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: the size of hd1 is 976773168.
/usr/sbin/grub-probe: info: scanning hd2 for LVM.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: scanning hd2,msdos1 for LVM.
/usr/sbin/grub-probe: info: the size of hd2 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: scanning hd3 for LVM.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: scanning hd3,msdos1 for LVM.
/usr/sbin/grub-probe: info: the size of hd3 is 976773168.
/usr/sbin/grub-probe: info: scanning hd4 for LVM.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: scanning hd4,msdos1 for LVM.
/usr/sbin/grub-probe: info: the size of hd4 is 976773168.
/usr/sbin/grub-probe: info: no LVM signature found.
/usr/sbin/grub-probe: info: opening lvm-root.
/usr/sbin/grub-probe: error: unknown filesystem.