I'm using a server with intel S5000vsa motherboard. I used embedded raid to create a logical disk ( 4 disks - raid 0 ). Each time after reboot ( even without switching off the server), the logical disk isn't existing any more. The 4 disks are seen when embedded raid initializes. Using I can add the former configuration, the LD with Raid-0 is seen, and my LD is back again. After leaving raid configuration and rebooting the LD is seen and my server is booting. If I do a reboot form operating system the raid configuration is lost again - and I have to reconfigure it again.