From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anssi Hannula Subject: Re: Recovery speed at 1MB/s/device, unable to change Date: Mon, 24 Apr 2006 00:37:48 +0300 Message-ID: <444BF3AC.4090804@gmail.com> References: <444BD3E7.4090601@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <444BD3E7.4090601@gmail.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Anssi Hannula wrote: > The speed is only 2000K/sec, even after I set: > --- > # cat /proc/sys/dev/raid/speed_limit_min > 10000 > # cat /proc/sys/dev/raid/speed_limit_max > 400000 > --- > > The system is about 90% idle, so there should be more bandwidth. > > --- > # cat /proc/version > Linux version 2.6.17-rc2-git4 (anssi@delta.onse.fi) (gcc version 4.0.1 > (4.0.1-5mdk for Mandriva Linux release 2006.0)) #1 Sun Apr 23 00:56:30 > EEST 2006 > --- Hmm... I don't know if this is related, but something seems to be really wrong. I run the following set of commands: # dd if=/dev/zero of=ohase count=5K # dd if=/dev/zero of=ohase2 count=5K # losetup /dev/loop0 ohase # losetup /dev/loop1 ohase2 # mdadm --create /dev/md_d1 -ap --level=5 --raid-devices=2 /dev/loop0 missing # fdisk /dev/md_d1 (created one partition) # mkfs.ext3 /dev/md_d1p1 # mount /dev/md_d1p1 /mnt/test # echo jopajoo > /mnt/iso/test # mdadm --manage /dev/md_d1 --add /dev/loop1 # mdadm --grow /dev/md_d1 --raid-devices=3 --backup-file backupfile mdadm: Need to backup 128K of critical section.. mdadm: /dev/md_d1: Cannot get array details from sysfs Strace shows that it's trying to access "/sys/block/md_d4/md/component_size". Why is this? -- Anssi Hannula