From mboxrd@z Thu Jan 1 00:00:00 1970 From: joystick Subject: Re: 3TB drives failure rate Date: Sun, 28 Oct 2012 23:12:19 +0100 Message-ID: <508DADC3.4080104@shiftmail.org> References: <11510711257.20121028131527@oudeis.org> <508D61A1.7020106@wildgooses.com> <508D65CF.1080904@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <508D65CF.1080904@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Joe Landman Cc: Ed W , =?ISO-8859-1?Q?Rainer_F=FCgenstein?= , linux-raid@vger.kernel.org List-Id: linux-raid.ids On 10/28/12 18:05, Joe Landman wrote: > On 10/28/2012 12:47 PM, Ed W wrote: > >> - Green consumer drives likely are satisfactorarily reliable for most >> uses, caveat that you accept they will fail catastrophically eventually >> (just like your enterprise drive will). We can debate the relative life >> of each, but it's almost certainly just a linear factor... > > Our experience is that they aren't acceptable for RAIDs in most cases, > unless you turn on TLER, and turn off the green functions at minimum. > In which case, what advantage do they have other than price? Do you have a magic way to turn on TLER on green drives and would like to share it with us? I can give you money smartctl scterc did not work there, last time I checked > Part of the issue is them falling out of RAIDs. Part of the the issue > are the occasional hiccups on coming out of sleep mode, which for most > desktops isn't a problem, but DEFINITELY an issue for RAIDs. This thing of "drives falling out of RAID" I have heard many times, but really don't know what people are talking about. How could a drive fall out of a RAID? A RAID is nothing special, it's just read/write commands given to a drive by a process called MD. If the drive drops out of RAID it means it would have dropped out of a normal computer doing normal I/O Please explain > > Another (sometimes significant) issue is that we've been noticing > partial coverage (e.g. missing functions) in some of the pages > available to sdparm with the desktop/consumer drives. This is very > annoying, especially if you are building a RAID. Most egregious on > SSDs, but we've seen one spinning rust device that did the same. These sdparm missing feature also would interest me, but actually less than a response to the other 2 topics above