From: Brandon I <[email protected]> Reply-To: <[email protected]> Date: Wednesday, May 28, 2014 at 1:18 PM To: <[email protected]> Subject: Re: [beagleboard] Can the BBB get damaged due to a hard power down?
> 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 Excellent paper. Thank you for sharing. Regards, John > > 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. It¹s an awesome >> board, don¹t 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 can¹t 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 <[email protected]> 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 <[email protected]> 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 [email protected]. >>>>> 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 [email protected]. >>>> 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 [email protected]. > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
