##Type below command to mount the root partition.
chroot /mnt/sysimage
## Edit modules.conf
vi /etc/modules.conf
## Add the following line:
alias scsi_hostadapter mptscsih
## check boot image file name fm grub.conf
vi /boot/grub/grub.conf
## create a new boot image incorporating LSI module (virtual scsi card ESXi)
mv /boot/initrd-2.4.20-8.img /boot/initrd-2.4.20-8.img.bak20140323
mkinitrd --preload mptbase /boot/initrd -8.img 2.4.20-8
## Finally reinstall grub on the boot partition of SCSI disk:
grub-install --recheck /dev/sda
(hd0) /dev/sda
grub-install /dev/sda
reboot
## Done, normal reboot ##