On Thu, Dec 24, 2009 at 11:53 AM, Ronald Klop <ronald-freebsd8 at klop.yi.org>wrote: > Isn't it write caching? > My Solaris machine at work also flushes the data every 30 seconds. > > Ronald. > > I think you are right. ZFS does work in bursts...it's very different than what most people expect. I know it was really weird to me when i first saw it.