From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761103AbYEMVA7 (ORCPT ); Tue, 13 May 2008 17:00:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758725AbYEMVAt (ORCPT ); Tue, 13 May 2008 17:00:49 -0400 Received: from fmmailgate02.web.de ([217.72.192.227]:41568 "EHLO fmmailgate02.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750883AbYEMVAs (ORCPT ); Tue, 13 May 2008 17:00:48 -0400 Message-ID: <003201c8b53c$67ff02d0$6400a8c0@bui.materna.com> From: "Roland" To: , , , , , Cc: Subject: WD doesn`t use disks with Linux - was Re: Re:Western Digital GreenPower drives and Linux Date: Tue, 13 May 2008 23:00:42 +0200 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-Provags-ID: V01U2FsdGVkX19V3xKVMRfv/+8IBSkPeEG7dGxHSyvGvOEOixs/ 7qBY2tcAexWZHeJ27bpEURxudUmZyauw/30TlrTouNMXGfmzPa 6+422g1mc= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >BTW, WD's tech support has gone silent so chances for an easier solution >are not so great. > >Tvrtko I`ve got a real funky response from WD support today, i`d like to share here. This is just too weird.... After asking if they could give a comment if the problem with the high Load_Cycle_Count may be an issue of their drives or an issue of Linux i got: ------ Dear...... The problem is, that we actually don`t use the disks with Linux. I´m sorry that i cannot send further information to you. Sincery yours Western Digital Service and Support ------ (translated from german) So, WD sells enterprise SATA disks, optimizied for 24/7 & Raid array usage, but they don`t seem to actually test them with Linux or at least are not able to "support" Linux usage....... Ridicuous! > List: linux-kernel > Subject: Western Digital GreenPower drives and Linux > From: "Tvrtko A. Ursulin" > Date: 2008-04-09 20:18:35 > Message-ID: 200804092118.35501.tvrtko () ursulin ! net > [Download message RAW] > > > Hi all, > > The subject may be a bit misleading since I haven't investigated the whole > issue under other OS-es (nor do I plan to), but this is how the story > goes.. > > Those fancy new WD GreenPower drives seem to be heavily suffering from the > rapidly increasing head load/unload problem. And the bad thing is they > don't > respond to 'hdparm -B', which would mean (I think) their power management > behaviour is solely up to their firmware. > > I got one of them (WD5000AACS) recently and to my horror after less than > three > days of being power on this is what I saw: > > 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 66 > 193 Load_Cycle_Count 0x0032 197 197 000 Old_age Always - 10233 > > At this rate the disk would reach it's design limit for load/unload cycles > in > around 80 days. Not good - so I implemented a lame workaround of keeping > disk > busy every couple of seconds - hopefully that won't kill it sooner that > unloads would.. > > I am also currently talking with first line of WD's tech support trying to > get > some data on how exactly those drives manage head unloading, but that may > not > lead anywhere useful. > > So in parallel I decided to ask here to see if someone knows something > about > this? > > If it matters, I am running vanilla 2.6.24 on that box and sata_sil is > driving > that disk. Otherwise it is a pretty basic Ubuntu 7.10, a mix of ext3 and > jfs > filesystems, all mounted with noatime. More detailed information available > on > request. > > Tvrtko > > >