Bug#549530: mdadm: checkarray caused machine lockup

[Christian Pernegger]

The behaviour is reproducible. Running checkarray --all always hangs
the box after some time with the symptoms described. That's true even
in single user mode with no other accesses.

I will now check if checking (no pun intended) the arrays serially works.

As this looks more like a kernel bug in md and/or libata I probably
shouldn't have reported it against mdadm in the first place. Sorry, it
was late ...

Any help appreciated,

Chris



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Bug#549530: mdadm: checkarray caused machine lockup

[Christian Pernegger]

Package: mdadm
Version: 2.6.7.2-3
Severity: normal


Tonight's checkarray triggered a slew of SATA errors, which finally
caused the machine to lock up completely (see attached syslog).

Possibly the hardware is flakey, but then I've been stressing it a lot
in the last few weeks without any problems. Is it possible that
checking multiple arrays in parallel does Bad Things(tm)?

(The kernel is from backports.org (see below))

Thanks,

Chris

-- Package-specific info:

-- System Information:
Debian Release: 5.0.3
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.30-bpo.2-amd64 (SMP w/4 CPU cores)
Locale: LANG=de_AT.UTF-8, LC_CTYPE=de_AT.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages mdadm depends on:
ii  debconf   1.5.24 Debian configuration management sy
ii  libc6 2.7-18 GNU C Library: Shared libraries
ii  lsb-base  3.2-20 Linux Standard Base 3.2 init scrip
ii  makedev   2.3.1-88   creates device files in /dev
ii  udev  0.125-7+lenny3 /dev/ and hotplug management daemo

Versions of packages mdadm recommends:
ii  exim4 4.69-9 metapackage to ease Exim MTA (v4) 
ii  exim4-daemon-light [mail-tran 4.69-9 lightweight Exim MTA (v4) daemon
ii  module-init-tools 3.4-1  tools for managing Linux kernel mo

mdadm suggests no packages.

other:
ii  linux-image-2.6.30-bpo.2-amd64   2.6.30-7~bpo50+1Linux 2.6.30 image on 
AMD64

-- debconf information:
* mdadm/autostart: true
* mdadm/mail_to: root
  mdadm/initrdstart_msg_errmd:
* mdadm/initrdstart: /dev/md0 /dev/md1 /dev/md2
  mdadm/initrdstart_msg_errconf:
  mdadm/initrdstart_notinconf: false
  mdadm/initrdstart_msg_errexist:
  mdadm/initrdstart_msg_intro:
* mdadm/autocheck: false
  mdadm/initrdstart_msg_errblock:
* mdadm/start_daemon: true


syslog.gz
Description: GNU Zip compressed data