A write-only integer that, when set to the clearStats option, resets the statistics counters for the I/O card in this slot. This gives an admin a way to zero out accumulated error/activity counters, such as far-end/near-end block errors, useful for establishing a clean baseline after fixing a problem or before a monitoring window. An admin who just replaced a cable causing errors would write clearStats to this object to reset the card's error counters to zero for future monitoring.