Well, it sounds a bit like a microsoft manager explaining why XP-Home has no terminal server features ;-)
I think an mkfs-option would be best, with a warning if the value given by the user is nonsence (3-8% ok?). On the contrary a 500GB hard drive with normal files on it would not benefit too much just because 25GB are free? lg Clemens > This is a bit arrogant, but I believe that a user that does not know how > to recompile the kernel with the #define changed is not sophisticated > enough to know how much he is going to hurt his performance by going > from 95% to 99% space used, and a user who does not want to bother with > recompiling is not going to study the topic enough to realize he is > making a mistake 80% of the time. It is important to know when > designing a product when your users intuitions are going to be wrong > 80%of the time, and while one should always be slow to reach such a > conclusion, I think this is such a case.