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In the past a few nasty power outages have caused doom2s array to have a heart attack. I finally got round to getting a UPS (Belkin F6C120*-UNV) and ended up using NUT to talk to it over the belkin software. Good notes by Peter Selinger and a great step by step guide by Avery Fay [...]
Another (unknown) power outage and another problem for the array. UPS & server lost power around 21:30, come the morning server is powered off. Boot once and hda1 has some a couple of errors but seems OK but then crashes the server with errors. Start again and mdadm freaks out trying to assemble the array [...]
Wow scary moment after a power outage. 2 out of 8 drives in my array in server “doom2″ were removed because they weren’t “fresh” killing the file system. You could see this in the syslog as:
Sep 14 17:14:37 doom2 kernel: md: bind<sda1>
Sep 14 17:14:37 doom2 kernel: md: kicking non-fresh sdh1 from array!
Sep 14 17:14:37 doom2 [...]