From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miles Fidelman Subject: Re: 3TB drives failure rate (summary) Date: Thu, 01 Nov 2012 12:25:04 -0400 Message-ID: <5092A260.4070402@meetinghouse.net> References: <11510711257.20121028131527@oudeis.org> <508D61A1.7020106@wildgooses.com> <508D65CF.1080904@gmail.com> <508DADC3.4080104@shiftmail.org> <508DB08D.20002@meetinghouse.net> <508DC6E9.8070001@shiftmail.org> <508DC922.7040400@meetinghouse.net> <20121029102919.1134a797@natsu> <508E3626.8080404@hesbynett.no> <508E7E68.1030202@turmel.org> <1494377384.20121031005457@oudeis.org> <50911AFF.9020707@turmel.org> <509291B2.5000907@meetinghouse.net> <50929430.50201@anonymous.org.uk> <509297CA.4090606@meetinghouse.net> <50929DDE.60906@anonymous.org.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <50929DDE.60906@anonymous.org.uk> Sender: linux-raid-owner@vger.kernel.org Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids John Robinson wrote: > On 01/11/2012 15:39, Miles Fidelman wrote: >> John Robinson wrote: >>> On 01/11/2012 15:13, Miles Fidelman wrote: >>>> Phil Turmel wrote: >>>>> I strongly encourage you to run "smartctl -l scterc /dev/sdX" for >>>>> each >>>>> of your drives. For any drive that warns that it doesn't support SCT >>>>> ERC, set the controller device timeout to 180 like so: >>>>> >>>>> echo 180 >/sys/block/sdX/device/timeout >>>>> >>>>> If the report says read or write ERC is disabled, run "smartctl -l >>>>> scterc,70,70 /dev/sdX" to set it to 7.0 seconds. >>>>> >>>>> You then set up a boot-time script to do these adjustments at every >>>>> restart. >>>> >>>> Sounds like a very bad idea if your drive is part of a RAID array. >>> >>> Either of these - the scterc if you can, the device timeout if you >>> can't - are an excellent idea if you are using a desktop drive as part >>> of a md RAID array. Why do you think otherwise? >> >> If I'm seeing that kind of device timeout, I want it out of my array, >> and I want an alert telling me to replace it. Otherwise my server's >> performance goes to s*&t. > > You might not want that kind of device timeout, but as you've made > clear earlier in this thread, you wouldn't use desktop drives in md > RAID, so this doesn't really apply to you. Except for the time I learned this the hard way. -- In theory, there is no difference between theory and practice. In practice, there is. .... Yogi Berra