1 of 1 people found this helpful
The two most common issues are:
1) untested hard drives - check the list at http://www.intel.com/support/motherboards/server/MFS5520VI/sb/CS-030301.htm
2) mixing hard drive manufacturers, models, or firmware revisions within the same storage pool. You can have different drives in the same chassis, you just have to make sure each storage pool consists of only one kind.
THank you Dan_O.problem was one of the two scm , with remove it from server and power off/on modular server problem solved.