kernel panic not syncing vfs unable to mount root fs on unknown-block 0 0
I am trying to install OEL 4.6 on DELL 1950 Power edge server.
As soon as the installation starts, i get following error
"kernel panic not syncing vfs unable to mount root fs on unknown-block 0 0"
I have tried installing on another server with same media & installation proceeds successfully.
I have removed H/W RAID & reconfigured it but still issue persists
Any help is appreciated.