CellBreak :
Yes mixing brands is perfectly fine.
Thanks
Yeah, it's like mixing Heinz mustard with Hellman's mayonnaise. The hard drives don't have to talk to each other, just to the motherboard, so there's no need to worry about multiple brands. My main rig has seven hard drives, a mix of WD, Hitachi, and Toshiba, with a Samsung SSD, and the only issues are the normal risk of a hard drive dying.