The problem I seemed to be observing (and seemed to be reported by others) was that the SD card gets corrupted even with RO file systems. Power cycling glitches cause inadvertent write cycles to the SD card.
-- Ralph ________________________________________ From: Przemek Klosowski [przemek.klosow...@gmail.com] Sent: Monday, November 05, 2012 10:09 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] What should I do to get the performance back? On Mon, Nov 5, 2012 at 12:52 PM, Ralph Stirling < ralph.stirl...@wallawalla.edu> wrote: > The big problem I've had with trying to put RPi's inside control > cabinets is that they *really* don't like to be powered off at > arbitrary times without a proper "shutdown -h now". Less than > a half-dozen power cycles and the SD card was corrupted. > There are ways to mount the root disk read-only, with a small ramdisk for temp files. There's even a way to layer a ramdisk over a readonly primary disk, where the ramdisk only holds the changing bits. You gain robustness---the boot always starts from the same pristine image, and nothing is ever written to the primary SD storage; no shutdown is required. You loose modifiability: no changes are ever recorded on the persistent SD storage. ------------------------------------------------------------------------------ LogMeIn Central: Instant, anywhere, Remote PC access and management. Stay in control, update software, and manage PCs from one command center Diagnose problems and improve visibility into emerging IT issues Automate, monitor and manage. Do more in less time with Central http://p.sf.net/sfu/logmein12331_d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
