From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brad Campbell Subject: Re: RAID newbie, 1 vs 5, chunk sizes Date: Wed, 18 Jun 2014 20:16:16 +0800 Message-ID: <53A18310.6020900@fnarfbargle.com> References: <539E5504.1080809@turmel.org> <2036850.atdiKx507N@eseries.newtech.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: =?UTF-8?B?TWF0aGlhcyBCdXLDqW4=?= , dag@newtech.fi Cc: =?UTF-8?B?TnVubyBNYWdhbGjDo2Vz?= , Linux-RAID List-Id: linux-raid.ids On 18/06/14 19:58, Mathias Bur=C3=A9n wrote: > On 18 June 2014 11:19, Dag Nygren wrote: >> Just love my HGST 4 TB drives. The first ones that haven't >> developed any pending/remapped sectors during the 9 months >> they have been in 24/7 use. Previously tried different Seagates, wit= h >> constant problems (And yes - Had the SCT turned on). Also tested a W= D red, >> but saw similar symptoms developing and so degraded that to a storag= e >> disk for my boy... >> HGST was some 20=E2=82=AC more expensive and hard to get here but de= finitely >> worth it. >> > > > If we're comparing drives, my 8x WD20EARS / EARX have been spinning > for years. 2 drives just failed after ~3.4 years uptime (24/7) and > over 400,000 head parkings. They had weekly SMART self-test and > monthly RAID6 scrubs, and a few unexpected power losses. Good value. > But YMMV. My experience has been almost any drive, no matter how naff can be made= =20 to last well by simply keeping them spinning and at a roughly constant=20 temperature. I generally replace my bulk storage drives at about 4=20 years. My first lot were Maxtor 250G cheapies and all 12 of them went=20 for over 4.5 years. My current batch are WD Green 2TB and they all have= =20 ~26,000 hours on them. One of my SAS drives has over 49,000 hours on it= =2E=20 Even a set of cheap Maxtor DiamondMAX 22 1TB drives lasted near enough=20 to 25,000 hours before I relegated them to an off-line backup machine. The constant has been keeping them running 24/7 and doing a pretty=20 thorough burn in to weed out the early life failures. =46or example the random WD Green 2T I picked has 26,917 hours and 60=20 power cycles. Most of those would have been caused over a 12 week perio= d=20 when I had power issues with the UPS and none would have been off long=20 enough to noticeably let the drive cool down. Keep 'em spinning and warm. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html