Hi, i am a newer with blktrace. I want to extract the disk seekdistance information for indicating read performance. But i found in blktrace it calculates seek distances based solely upon the ending block address of one IO, and the start of the next. Is this correct or something i missed. Thanks Best regards, linbin -- To unsubscribe from this list: send the line "unsubscribe linux-btrace" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html