From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephan von Krawczynski Subject: Re: Some very basic questions Date: Wed, 22 Oct 2008 15:52:21 +0200 Message-ID: <20081022155221.e147a36b.skraw@ithnet.com> References: <20081021132322.271ad728.skraw@ithnet.com> <48FDD710.5050702@hp.com> <20081021190136.89b2c6af.skraw@ithnet.com> <20081021171513.GA8799@infradead.org> <48FE11F9.7040700@gmail.com> <20081022142759.ac33a16c.skraw@ithnet.com> <1224681345.6448.4.camel@think.oraclecorp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Cc: Ric Wheeler , Christoph Hellwig , jim owens , linux-btrfs@vger.kernel.org To: Chris Mason Return-path: In-Reply-To: <1224681345.6448.4.camel@think.oraclecorp.com> List-ID: On Wed, 22 Oct 2008 09:15:45 -0400 Chris Mason wrote: > On Wed, 2008-10-22 at 14:27 +0200, Stephan von Krawczynski wrote: > > On Tue, 21 Oct 2008 13:31:37 -0400 > > Ric Wheeler wrote: > > > > > [...] > > > If you have remapped a big chunk of the sectors (say more than 10%), you > > > should grab the data off the disk asap and replace it. Worry less about > > > errors during read, writes indicate more serious errors. > > > > Ok, now for the bad news: money is invented. > > If you replace a disk before real failure you won't get replacement from the > > manufacturer. That may sound irrelevant to someone handling 5 disks, but is > > significant if handling 500 or more. The replacement rate is indeed much > > higher than people think from their home pcs. > > Hardware vendors already do replace disks based on policies defined by > their own array hardware. These are already predictive. Lets agree that the market for drives, arrays and related stuff is big and contains just about any example one needs for arguing :-) Nevertheless we probably agree that if john doe meets big-player and tries to warranty-replace a non-dead drive he will have troubles. > -chris -- Regards, Stephan