From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anssi Hannula Subject: Recovery speed at 1MB/s/device, unable to change Date: Sun, 23 Apr 2006 22:22:15 +0300 Message-ID: <444BD3E7.4090601@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids I created a raid array: --- # mdadm --create /dev/md_d0 -ap --level=5 --raid-devices=2 \ /dev/sda1 missing --- Then partitioned it: --- # LANGUAGE=C fdisk -l /dev/md_d0 Disk /dev/md_d0: 250.0 GB, 250056605696 bytes 2 heads, 4 sectors/track, 61048976 cylinders Units = cylinders of 8 * 512 = 4096 bytes Device Boot Start End Blocks Id System /dev/md_d0p1 1 61048976 244195902 83 Linux --- Then made a ext3 filesystem in /dev/md_d0p1 with mke2fs. Then I added another device: --- # mdadm --manage /dev/md_d0 --add /dev/sdb1 --- Currently status is: --- # cat /proc/mdstat Personalities : [raid0] [raid5] [raid4] md_d0 : active raid5 sdb1[2] sda1[0] 244195904 blocks level 5, 64k chunk, algorithm 2 [2/1] [U_] [>....................] recovery = 1.0% (2588800/244195904) finish=2100.4min speed=1916K/sec unused devices: --- 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 --- Any tips? -- Anssi Hannula