dear sirs, i have taken image of 1 machine using acronis ver9.0 which has
3gb swap /sda1
25gb /slash /sda2
108gb /oracle /sda3

so on another machine when i restore everything restore and data i can see, but boot, MBR not working.
it just come written on screen "GRUB"

i try to reinstall grub not working
booth rhel cd
then type >linux rescue
> chroot /mnt/sysimage
>/sbin/grub-install /dev/sda2

it give me error does not work and i reboot the machine.

can someone teach or guide how to restore,repair, or fixed MBR

kind regards

First, there are not just "sirs" on here. And if you'd like help, how about actually telling us WHAT error?? Saying "it give me error does not work", doesn't give us much to go on.

Acronis appears to be commercial software..and you're using RedHat Enterprise. You're paying for support from both...did you try to call either of them?