For the damage question, yes, with all flash media, if you're not using a read only mount: http://cseweb.ucsd.edu/~swanson/papers/DAC2011PowerCut.pdf
Btw, you're crazy if you're not using a read only mount (or guaranteeing no writes) for the rootfs of an appliance. ;) On Tuesday, May 27, 2014 7:46:07 AM UTC-7, stino wrote: > > Hi Gerald, Look I'm sorry if you took offence by my comment. It’s an > awesome board, don’t let anybody convince you otherwise It's just that > I've not seen it being mentioned anywhere that a correct power down > procedure is required. If it was a deliberate design choice not to provide > some kind of fail-safe, I personally would have definitely made this clear > to every buyer. I work hands-on with computer equipment of various makes > and models on a daily basis and I honestly can’t remember the last time a > box got bricked due to a power outage. I myself, and as I suspect many > others, am thinking about turning the BBB into an embedded appliance which > makes the power button inaccessible. > > Can you suggest how we can extend the powerbutton of from the board? > > > Op dinsdag 27 mei 2014 15:27:21 UTC+2 schreef Gerald: >> >> This is why there is a power button. I suggest that you go to your PC and >> yank the power cord. Whether it is running Linux or Windows, I suspect it >> won't like it. >> >> If you can't use the power button, then yes you can design a cape >> that will let it gracefully shutdown properly. When I designed the board I >> felt that a button was less expensive that all the other stuff you would >> need to put on the cape. Not to mention the small form factor of >> the board made it tough to fit all that onto the board. And yes, in a small >> number of instances, we have seen that yanking the power may cause damage >> to the processor because the PMIC does not have enough time to power down >> the processor in the correct voltage sequence. So, use the power button. >> >> >> >> Gerald >> >> >> On Mon, May 26, 2014 at 10:37 AM, William Hermans <yyr...@gmail.com>wrote: >> >>> What happens, or *can* happens when you just yank the power on a PC >>> running Linux ? >>> >>> 1) You can make teh file system read only. >>> 2) You can design or create a power cape that shutdown gracefully when >>> power goes missing. >>> ...) ??? >>> >>> >>> On Mon, May 26, 2014 at 6:32 AM, stino <stijnd...@gmail.com> wrote: >>> >>>> >>>> I read over at another forum that the BBB could get damaged if it >>>> recieved an unexpected "hard" power down.., is this true, what can we do >>>> about this? >>>> >>>> Seems like a serious design flaw to me. One can't expect a power source >>>> to be 100% stable and especially with a development board which is likely >>>> to used for embedded appliances this is a reall issue.. >>>> >>>> Thanks, >>>> >>>> >>>> -- >>>> For more options, visit http://beagleboard.org/discuss >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "BeagleBoard" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to beagleboard...@googlegroups.com. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to beagleboard...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
