Dell 2850 Windows Server 2008 Enterprise with SP1, Main Domain controller, DNS and GC crash when RAID 1 fail at the moment when installation of updates was perform . I have manage to bring up logical driver but OS constantly reboot when GUI come. I have managed to start in save mode with f8 directory service restore mode. Then OS try to install 3/3 update and restart and reboot again. When I bring up with directory restore mode than OS start to reinstall last update as a not properly install. But again restart and reboot in loop. I have try with and without network connection but no success.