From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Evans Subject: Re: woes with... mdadm ? Date: Tue, 26 Jan 2010 20:14:22 -0800 Message-ID: <4877c76c1001262014w6219132ew552b092dab9aba62@mail.gmail.com> References: <4B5F6C5D.8020202@ultratux.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Return-path: In-Reply-To: <4B5F6C5D.8020202@ultratux.net> Sender: linux-raid-owner@vger.kernel.org To: Maarten Cc: linux-raid List-Id: linux-raid.ids Lets validate some basics first: 1, 2) Have you stress-tested your CPU and ram? 3: the CRC is off only on two nibbles (between bits 4 and 11); and nowhere else. That usually doesn't happen with CRCs. 3) >> In the past I had some similar SATA controllers become corrupted by some test-debugging code in an older version of the kernel. Even if the devices firmware is up to date TRY REFLASHING/'updating' THEM. << 4) Have you run S.M.A.R.T. self tests 5) If possible badblocks as well; once you've verified everything else. Those are all possible and easy to test for causes of data-corruption.