Hi there, Very appreciated about your "blktrace", "btt" and gelato_ICE06apr_blktrace_brunelle_hp.pdf. They are quite powerful! I am using blktrace-1.0.1-4.3.i586 on kernel 2.6.31.8, but the btt output seems a little bit different from that pdf. This doc only explained Q2I I2D D2C Q2C Can anybody help to explain the detail meaning of: Q2Q Q2G G2I Q2M M2D Or is there any more detailed document about Q, G, I, M, D etc? Thank you very much Leon -- 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