Steve, Thanks for your help..I followed the intel link but it links me to the "Version 7.5 of the Intel® Matrix Storage Manager" which I have already installed, and

that does not solve this problem... the 19 to 25 drive errors are "verification errors" (no further explaination given) reported by the "Intel Matrix Storage Console"....there is some sort of software shutdown (100% of time) & "sleep mode" 50% of time that in the process of shutting down the mirrored drives pick up verification errors & become unmirrored....