A solution would be to design a cape with a small battery to provide enough power to enable the Beagleboard to gracefully power down when it detects that external power is gone. That is probably the quickest solution.
A second solution would be to audit the code to ensure the the file system is not left in an unstable state during a power outage. Companies like Red Hat and Google have spent $10's of millions on this problem. It is even more interesting for cloud people as virtual machines tend to be started and stop very frequently. Both of these are really interesting problems. My guess is that if anyone wanted to work on these as personal projects or 'value adds' for their devices Robert, et. al. would be very interested into pulling them into main line once the kinks were worked out. To provide some perspective, the ardunio is a really rugged, low powered device. The BBB is a fragile, high powered device. Both have pros and cons... and their place. On Tue, May 27, 2014 at 9:46 AM, stino <stijndekl...@gmail.com> 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. -- 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.
