>>>>> "Neil" == NeilBrown <neilb@xxxxxxx> writes: Neil> But I'm pretty sure raid5 will do the wrong thing with a Neil> WRITE_SAME request. Yeah, you should set: mddev->queue->max_write_same_blocks = 0; before disk_stack_limits() is called. Just like it's done with discard_zeroes_data. -- Martin K. Petersen Oracle Linux Engineering -- 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