On Monday 05 November 2012 14:14:57 Przemek Klosowski did opine: > 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.
I don't think you have to loose the modifiability. dd-wrt has been booting from compact flash with multiple "partitions" for several years. The main boot is read-only of course, but the optional config info, is written to a read/write partition that generally might get written to several times at initial configuration time by mounting it r/w to write to it, then is remounted read-only, usually for life. Added iptables rules, network setup info is all protected. I have never had a power cycle of any kind including me pulling the power cord from the wall plug contaminate it even when using it on an old x86 box with a CF adapter on the end of an IDE drive cable. I see no reason why the RPi can't do much the same thing. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! When the going gets tough, the tough go shopping. ------------------------------------------------------------------------------ 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
