My HP-Proliant "ML 570 G3" Machine have faced abnormal shutdown due to a power failure.

after the event : "Operating System not found" appeared & the system could not load operating system.

O/S: RHEL AS 4 update 2
Software Raid 1+0 were configured.

Facts Gathered:

All mount points are accessible through Linux Rescue Environment.

Try to re-install the grub, it failed with error "not a charactor device" { i have tried by giving all the available paths )

try to use fdisk, it failed with "Not a valid Partition table"

Any suggestions / recommendations will be highly appreciated.