Bug#539154: mdadm: Keeps detecting NewArray events as fast as the CPU goes
Casper Gielen
casper at gielen.name
Thu Jul 23 10:46:39 UTC 2009
Package: mdadm
Version: 3.0-2
Severity: normal
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My syslog is filling up with the following message, at about 10 per second:
Jul 23 12:34:01 vodka mdadm[6677]: NewArray event detected on md device /dev/md0
The messages are generated by mdadm-raid which uses up 100% cpu.
This is probably caused by a broken harddisk that was removed from the system.
This harddisk was used in two arrays, md6 (raid6) and md0 (raid0). The raid6 array
works fine, but the md0 array is constantly redetected (I know it can't be assembled).
/proc/mdadm
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4]
md2 : active raid0 hde1[0] hdg1[3] sdb1[2] hdc1[1]
42957312 blocks 64k chunks
md6 : active raid6 sdb5[0] hde5[3] hdg5[2] hdc5[1]
319435968 blocks level 6, 64k chunk, algorithm 2 [5/4] [UUUU_]
md0 : inactive hde6[0]
9767424 blocks
unused devices: <none>
/etc/madadm/mdadm.conf
DEVICE partitions
# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes
# automatically tag new arrays as belonging to the local system
HOMEHOST <system>
# instruct the monitoring daemon where to send mail alerts
MAILADDR root
# definitions of existing MD arrays
ARRAY /dev/md0 level=raid0 num-devices=2 UUID=d8438e3b:9d6ce068:91b39ec9:b6d7a30b
ARRAY /dev/md6 level=raid6 num-devices=5 UUID=978f79ab:eda7bccc:91b39ec9:b6d7a30b
ARRAY /dev/md2 level=raid0 num-devices=4 UUID=9a30244a:d979c88f:91b39ec9:b6d7a30b
- -- Package-specific info:
- -- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable'), (101, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.30-1-686 (SMP w/1 CPU core)
Locale: LANG=nl_NL.UTF-8, LC_CTYPE=nl_NL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages mdadm depends on:
ii debconf 1.5.27 Debian configuration management sy
ii libc6 2.9-21 GNU C Library: Shared libraries
ii lsb-base 3.2-23 Linux Standard Base 3.2 init scrip
ii makedev 3.3.8.2-0 Creates device files in /dev
ii udev 0.141-1 /dev/ and hotplug management daemo
Versions of packages mdadm recommends:
ii module-init-tools 3.9-2 tools for managing Linux kernel mo
ii nullmailer [mail-transport-ag 1:1.04-1.1 simple relay-only mail transport a
mdadm suggests no packages.
- -- debconf information:
mdadm/autostart: true
* mdadm/initrdstart: all
mdadm/initrdstart_notinconf: false
mdadm/initrdstart_msg_errexist:
mdadm/initrdstart_msg_intro:
mdadm/initrdstart_msg_errblock:
mdadm/start_daemon: true
mdadm/mail_to: root
mdadm/initrdstart_msg_errmd:
mdadm/initrdstart_msg_errconf:
mdadm/autocheck: true
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