From mboxrd@z Thu Jan 1 00:00:00 1970 From: "P. Gautschi" Subject: Re: Raid5 drive fail during grow and no backup Date: Fri, 07 Nov 2014 17:07:26 +0100 Message-ID: <545CEE3E.2060807@gautschi.net> References: <5455A35C.2060000@turmel.org> <5458FC2A.1050308@turmel.org> <545CCAEA.6070204@turmel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <545CCAEA.6070204@turmel.org> Sender: linux-raid-owner@vger.kernel.org To: Vince , linux-raid@vger.kernel.org List-Id: linux-raid.ids > Interesting. I use the WD Red drives, too, and recommend them. Your drive's smartctl report is clean as far as wear & tear is concerned. That suggests a hardware problem elsewhere in your system. Bad cable, perhaps, or a failing power supply. To me, it looks like a power problem: 50 out of 177 power cycles are power losses: > 12 Power_Cycle_Count -O--CK 100 100 000 - 177 > 192 Power-Off_Retract_Count -O--CK 200 200 000 - 50 I had something like this in my system due to a bad SATA power split cable. Patrick