On Fri, Mar 6, 2009 at 11:32 AM, W B Hacker <[email protected]> wrote: > * Tawan Ruanebo wrote: >> >> hi, >> >> i have several sata hard drives connected to my debian testing >> machine. two of them are data drives that spin down after ten minutes >> of no access. only one of them wakes up every half hour. so i >> unmounted the two disks, and the one still wakes up regularly. it took >> me some time to find out (via lastcomm) that exim is responsible for >> this. it is the only process running at exactly the moment the disk >> wakes up. nobody had any idea how this could be, maybe somebody here >> can help me out. i sometimes don't use these drives for days, so i'd >> really like to not have them sit there producing nothing but heat. >> >> cheers! >> >> sarefo >> > > Exim may well be what is running - BUT - I'm inclined to believe it is doing > so - at least at the same time that those drives are fired-up, as a result > of a cron job, accounting, log-rotation check, or syslogd that is checking > queues, quotas, filesystem health, log size/age, or other storage-related > things - more especially if it is within a minute or so of the same time, > and on a rigid schedule. > > A grep -r of /var/log on timestamps should find the perp.
yay, there it is :) it's the smartd. very smart if it wakes up the disks every time ;) but of course in hindsight that makes perfect sense. i just find it strange that it doesn't show up in lastcomm, or in crontab. many thanks, you saved my peace of mind and some bucks from my energy bill :) cheers sarefo -- How terrible is wisdom when it brings no profit to the wise, Johnny. -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
