> "When issuing the DEFRAG C: -A-V command,, you get a lot of information, but you can not decide if it is good or bad.

MS are using percentage, but you are not sure of what."

Well... when the fragmentation percentages are high (MS relative fragementation of files - AFAIK), the result set returned generally should contain a message such as: "You should defragment this volume.", which seems to pretty clearly suggest what to do.

> "The figure LAVELEVEL give, is proportional to the performance degradation of the computer, and thus to the satisfaction of the user. It is extremely important in Servers. You may live without it if you decide not to look ant your data's internal structure. Please remember, that copying the disk solves everything!"

Well, fair enough on that point perhaps; percentage fragementation as a metric may leave something to be desired. One might imagine that with respect to increments at the high end say 70% + 5% that performance may perhaps become very bad indeed (relative to increments at the low end say 10% + 5%) - would this then be sort of situation the proposed statistic would reflect somewhat better?