On Tue, 02 Oct 2012 20:51:31 +0100 John Robinson <john.robinson@xxxxxxxxxxxxxxxx> wrote: > On 02/10/2012 16:56, Brian Candler wrote: > > On Tue, Oct 02, 2012 at 03:56:42PM +1000, NeilBrown wrote: > >> Lesson: always do a read test as well as a write test! > > > > And there was me thinking that drives read back data after writing it - > > clearly they do not :-) > > Would it be worth adding a re-read onto the end of the usual read > failure reconstruct-write cycle? What? Read twice? We already read after the write when attempting to fix a failure. I suspect it doesn't do much good though as the data is in cache in the drive. NeilBrown
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