From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marco Schindler Subject: Re: frequent disk activity with mdadm-3.3 Date: Fri, 12 Sep 2014 14:15:35 +0200 Message-ID: References: <20140912082403.549fc298@notabene.brown> <164CD08B-99CA-4007-855A-7B0561B4EC76@gmail.com> Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <164CD08B-99CA-4007-855A-7B0561B4EC76@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: NeilBrown Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids ok, that=92s interesting. the process id is _not_ mdadm daemon and it looks like the spindown its= elf is triggering the process. ps ax | grep mdadm 28956 ? Ss 0:00 mdadm --monitor --scan --daemonise --pid-fil= e /var/run/mdadm.pid --syslog grep sda /var/log/messages Sep 12 13:55:04 alina spindown: sda is now inactive. Sep 12 13:55:09 alina kernel: mdadm(29737): READ block 3907028992 on sd= a (8 sectors) Sep 12 13:55:17 alina kernel: mdadm(29737): READ block 3907029152 on sd= a (8 sectors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 0 on sda (8 sect= ors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 8 on sda (8 sect= ors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 8 on sda (8 sect= ors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 3907029167 on sd= a (1 sectors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 3907029166 on sd= a (1 sectors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 0 on sda (1 sect= ors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 0 on sda (1 sect= ors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 3907029152 on sd= a (8 sectors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 0 on sda (8 sect= ors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 8 on sda (8 sect= ors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 8 on sda (8 sect= ors) Sep 12 13:55:26 alina kernel: mdadm(29737): READ block 8 on sda (8 sect= ors) Sep 12 13:56:12 alina spindown: sda is now active. here=92s the output of blktrace -d /dev/sda during that time. https://dl.dropboxusercontent.com/u/3464720/blktrace.tar.bz2 -- 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