From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brad Campbell Subject: Re: It is safe to stop Raid being reshaped Date: Fri, 30 Dec 2011 07:35:27 +0800 Message-ID: <4EFCF93F.6000607@fnarfbargle.com> References: <4EFB67CC.7010500@shiftmail.org> <4EFBCA47.9010401@shiftmail.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Jeremy Thompson Cc: Asdo , linux-raid List-Id: linux-raid.ids On 29/12/11 10:23, Jeremy Thompson wrote: > Here is an excerpt from the dmesg log: > > [77832.251754] ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x280000 action 0x0 > [77832.261281] ata3.00: BMDMA2 stat 0x696d0009 > [77832.271043] ata3: SError: { 10B8B BadCRC } > [77832.280933] ata3.00: failed command: READ DMA EXT > [77832.290523] ata3.00: cmd 25/00:00:78:0f:c0/00:04:5b:00:00/e0 tag 0 > dma 524288 in > [77832.290526] res 51/04:6f:78:0f:c0/00:00:00:00:00/f0 Emask > 0x1 (device error) > [77832.308903] ata3.00: status: { DRDY ERR } > [77832.318246] ata3.00: error: { ABRT } > [77832.408077] ata3.00: configured for UDMA/100 > [77832.408142] ata3: EH complete > > The same lines go for ata6 and ata5. So 3 drives have bad cables? I > have to mention before starting the reshaping process, I did not see > these errors or at least they were not as pronounced as they are > today. > I'd have a close look at your power supply rather than the cables. I've seen odd behaviour across multiple drives when they were all under load (as they are in a reshape) which went away when I replaced the marginal power supply with something more substantial and better engineered. Regards, Brad