As an interesting update for everyone on this thread.... I replaced all my drives with a single type/speed (WD Red) and now that the older Samsung HD103SJ (now Seagate) drives have been gone, I haven't had any mismatch_cnt hiccups with that marvell JBOD MV8 controller. Just thought I'd offer that as a current data point. Cheers, -Ben -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html