Hi. Just run into this bug using 12.04 Ubuntu and 3.2.0-24-generic kernel.
here is the syslog: May 6 00:57:02 Vouhaukko2 CRON[10944]: (root) CMD (if [ -x /usr/share/mdadm/checkarray ] && [ $(date +%d) -le 7 ]; then /usr/share/mdadm/checkarray --cron --all --idle --quiet; fi) May 6 00:57:02 Vouhaukko2 kernel: [738906.402166] md: data-check of RAID array md0 May 6 00:57:02 Vouhaukko2 kernel: [738906.402173] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. May 6 00:57:02 Vouhaukko2 kernel: [738906.402179] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check. May 6 00:57:02 Vouhaukko2 kernel: [738906.402187] md: using 128k window, over a total of 488384448k. May 6 00:57:02 Vouhaukko2 mdadm[1216]: RebuildStarted event detected on md device /dev/md0 and after that it hangs. Anything I can do to help nail it? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/212684 Title: RAID1 data-checks cause CPU soft lockups To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/212684/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs