Can you shed some light on this for me? currspeed = (j-mddev->resync_mark_cnt)/2/((jiffies-mddev->resync_mark)/HZ +1) +1; jiffies is divided by HZ here, which results in a quantity of dimension time-squared! I could understand it (better) if jiffies were multiplied by HZ. Peter - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html