Hi I have a Fujitsu Siemens RX 300 S4 with 6 GB RAm, 2 x quad core and 6 x 146 GB SAS drives on LSI MegaRAID 1078 controller. After installing fedora 10 completely and even Red Hat 5 and after rebooting system it wont start stating "Operating System not found", I tried to change the boot order, even if I leave fedora DVD on drive it will first say "Operating System not found", and afterwards start the system from dvd. When I enter rescue mode it finds the files and the filesystem. Does any1 have a clue what is happening.

I tried to remove even the RAID, it simply fried some space but not done anythink to solve my problems, I didnt find the way to disable the controller and use drives as ide.

Plz help and thanks for haveing patience to read it and thank you very much for replying.

Next day it pointed that the first SAS HD failed, and after changing slots of SAS HD's I saw that the firs SAS slot made all the problem and now it works fine.