On Mon, Apr 07, 2008 at 09:15:25AM -0700, David Brown wrote: > On Mon, Apr 07, 2008 at 12:39:21PM +0100, Luciano Rocha wrote: > > >> > You're using XFS. Did you have a power fail in the recent past? > >> How did you know? > > > > XFS doesn't order metadata writes with data writes, so if the power > > fails, it can find an update in the journal but the data wasn't written. > > Then it fills the file with zeroes to the new size. > > This behavior should be a lot better for recent kernels. To be fair, it hasn't happened to me lately. But I haven't lost power often, so I can't say it's fixed. ;) > xfs does even better with write barriers. But any file change that is more > than one write can be corrupted or split by an inopportune powerdown. Maybe, but I'm still waiting for barrier support through device-mapper. -- lfr 0/0
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