Hi, I have HP DL 180 G6 2U Rack Server with HP Smart Array Controller Card B110i Onboard SATA Controller Chipset. This server has 4 * 500 GB SATA HDD have configured RAID 1+0 and it shows Single Logical Drive of 940 GB Hard Disk in the RAID BIOS. Have created driver diskette using dd command to enable this controller card to the CentOS 5.6 x86_64 arch and it shows HP LOGICAL VOLUME of size 940 GB by the Anaconda installer to load CentOS 5.6 on these server. Below are the steps to enable driver diskette from HP (http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?swItem=MTX-253be2baaf684954a55b6680ad&lang=en&cc=us&idx=1&mode=4&) gunzip hpahcisr-1.2.6-7.rhel5.x86_64.dd.gz dd if=hpahcisr-1.2.6-7.rhel5.x86_64.dd of=/dev/sdb (USB Flash Drive) CentOS 5.6 Installation Procedure :- Boot up the System using DVD containing CentOS 5.6 and type linux dd blacklist=ahci and then it asks for load driver diskette and then point it to the USB Flash Drive which contains the SATA Controller driver image. The driver gets loaded during the installation and after OS Installation is complete and then reboot it fails and says "Error 21: Selected disk does not exist" and when i edit grub grub> root (hd0,0) and press b to boot it works fine and later I get the below message on the Console with Kernel Panic. Mounting root filesystem. mount: could not find filesystem '/dev/root' Setting up other filesystems. Setting up new root fs setuproot: moving /dev failed: No such file or directory no fstab.sys, mounting internal defaults setuproot: error mounting /proc: No such file or directory setuproot: error mounting /sys: No such file or directory Switching to new root and running init. unmounting old /dev unmounting old /proc unmounting old /sys switchroot: mount failed: No such file or directory Kernel panic - not syncing: Attempted to kill init! Am i missing anything? Please suggest/guide. Regards, Kaushal