[andrewcooke]

isn't this what raid scrubbing is for? http://en.gentoo-wiki.com/wiki/Software_RAID_Install#Data_Sc...

    for raid in /sys/block/md*/md/sync_action; do                                   
        echo "check" >> ${raid}

does that fix the issue? i run that once a week. i thought i was ok. am i not? if i am, isn't this old news?

[pfg]

yes, you should be fine. AFAIK most distros set up cronjobs for this automatically (for example, Debian/Ubuntu runs that once a month).