On Tue, Sep 19, 2006, Micha? Margula wrote: > Hello! > > I have a aufs on /dev/sdc. Iowait takes about 40% of CPU. If I add > another disk, will it make that load lower? Is it good idea to use two > disks with aufs (diskd is unstable unfortunately)? Yes, AUFS is fine. Take a look at http://www.squid-cache.org/~adrian/coss/ - note the dramatic drop in IOWAIT when using COSS. It also depends on the hardware you're using. What kind of disks are they? Which OS? Which controller? Adrian