From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gavin Flower Subject: Re: RAID6 data-check took almost 2 hours, clicking sounds, system unresponsive Date: Fri, 8 Apr 2011 02:59:52 -0700 (PDT) Message-ID: <1215.67697.qm@web65110.mail.ac2.yahoo.com> References: <20110408193426.028b0f00@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20110408193426.028b0f00@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: NeilBrown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --- On Fri, 8/4/11, NeilBrown wrote: > From: NeilBrown > Subject: Re: RAID6 data-check took almost 2 hours, clicking sounds, s= ystem unresponsive > To: "Gavin Flower" > Cc: linux-raid@vger.kernel.org > Date: Friday, 8 April, 2011, 21:34 > On Thu, 7 Apr 2011 18:32:04 -0700 > (PDT) Gavin Flower > wrote: >=20 > > Hi Neil, > >=20 > > My original email may have been eaten: as it did not > appear on the list, nor did I get an error message > back.=A0 So perhaps there was a problem with the attached > files. > >=20 > > I will resend the attachments one at a time in > separate emails. > >=20 > >=20 > > Cheers, > > Gavin > >=20 > > [begin original] > > Hi Neil, > >=20 > > Your help (or anybody else's) would be greatly > appreciated, yet again >=20 > Hi Gavin, > it isn't clear to me what help you want. >=20 > Obviously there is some sort of hardware issue - possible a > drive, possibly a > bus problem - I really don't know. >=20 > Apart from that things look normal. >=20 > What exactly did you want explained? >=20 > NeilBrown I guess I was surprised that the RAID system appeared normal and that i= t did not register any errors. I was hoping to get an idea as to which= drive was problematic. I get the feeling, from your reply, that this is not specifically a RAI= D problem, that it just happens to affect a RAID array. I had thought that the RAID system should have been able to give me bet= ter diagnostics, but possibly I am being (inadvertently) unreasonable! Not sure what the significance of this mismatch is, and what I should d= o about it. # cat /sys/block/md2/md/mismatch_cnt=20 28904=20 #=20 Thanks, Gavin > >=20 > > This morning, I noticed my system was extremely > unresponsive, and that there were clicking sounds coming > from one of my 5 hard drives.=A0 Also that there was > excessive disk I/O even for trivial things like bring up a > directory window, and lots of ata3 errors being reported to > the system log.=A0 These symptoms were mostly during a > raid check process. > >=20 > > Somewhere along the way, I seemed to have lost my swap > partition! > >=20 > > So I did some extensive investigations, which took > most of the day.=A0 My notes were created in OpenDocument > format using LibreOffice, but I have converted them to txt > format for the include - but I can supply the ,odt file if > requested. > >=20 > > I Have included 2 files: > >=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 > my notes: raid-notes-20110407a.txt > >=A0 =A0 selected log entries: > messages-gcf-20110407-ATA > >=20 > > If there are some additional diagnostics that might > prove useful, please let me know. > >=20 > >=20 > > Cheers, > > Gavin > > [end original] > > -- > > All Adults share the Responsibility > > to help Raise Today's Children, > > for they are Tomorrow's Society! > > -- > > To unsubscribe from this list: send the line > "unsubscribe linux-raid" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at=A0 http://vger.kernel.org/majordomo-info.htm= l >=20 >=20 -- 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