disk fragmentation, <0%?

[Lowell Gilbert]

Don't top-post, please.

Lei Sun <lei.sun at gmail.com> writes:

> Then, my other question is,
> 
> If the file space allocation works like Glenn said earlier, how come
> with the exact same files from 2 different installations using the
> exact procedures, can result in different fragmentation?
> 
> in the atacontrol raid1 failure case, /dev/ar0s1a: ... 0.5% fragmentation
> in the new build case, /dev/ar0s1a: ... 0.0% fragmentation
> 
> That doesn't seems to make a lot of sense.

There are lots of possible explanations, including (non-harmful) race
conditions.  Is there some reason you care?