On Tue, Feb 17, 2009 at 8:48 PM, Jason King <jason at ansipunx.net> wrote: >> If a disk has two slices used for different purposes, then you need to know >> how >> much traffic goes to each slice so as to be able to work back to a filesystem >> or metadevice and hence what's using it. > > But if you already have the filesystem stats, would that be enough already?
No. Assuming you're talking about fsstat data, then that's logical operations anyway - so it could be read out of cache rather than hitting the disk. And you may not even have a filesystem (swap, or raw partitions) or an FS that doesn't export the vopstats that fsstat uses. -- -Peter Tribble http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/
