ERROR WHEN YOU WANT INSTALL, CENTOS :
” Warn­ing: Disks sda, sdb con­tains BIOS RAID meta­da­ta, but are not part of any rec­og­nized BIOS RAID sets. Ignor­ing disks sda, sdb.”

!! This clean resolve this one sit­u­a­tion !!

CLEAN DISC
run cmd in MS win­dows
diskpart
list disk
select disk [disk which you want clean from MBR data, exam­ple 1]
celean

SORUCE :
http://smallbusiness.chron.com
www.centos.org