> > *The cheapest solution right now to safe guard from unexpected power > outages. Is to buy a battery, and connect it to the PMIC test points. This > will give the beaglebone enough time to issue a clean shutdown after input > power goes missing. And that it exactly what it will do, power down.* >
Technically the cheapest option is free. Use USB power, plug into a laptop, and be sure to always issue shutdown now -h every time you need to power down. On Thu, Apr 21, 2016 at 9:25 AM, William Hermans <yyrk...@gmail.com> wrote: > *In the real world, BBBs and other devices will experience unexpected and >> unplanned power outages, should be designed, and up to a reasonable point >> are designed to survive them. I have both intentionally and unintentionally >> rudely removed power from BBBs many, many times (hundreds?) with no ill >> effects.* >> > > I think you all expect far too much from an originally $45 SBC, and now a > $55 SBC. All this stuff you all are talking about, including just changing > an information card to tell people not to just yank power. Costs monies. > > The cheapest solution right now to safe guard from unexpected power > outages. Is to buy a battery, and connect it to the PMIC test points. This > will give the beaglebone enough time to issue a clean shutdown after input > power goes missing. And that it exactly what it will do, power down. > > Anyway, the above solution can be done for $10 or less, and if Gerald / > circuitco designed this from the start, onto the beaglebone. It would at > minimum have driven the price up $5 per board or more. For an option many > people would not need or use. > > So, if you need feature yourself. google "beaglebone UPS" and you'll find > all kind of information. Then buy yourself a battery, and learn how to do > this yourself . . > > On Thu, Apr 21, 2016 at 6:51 AM, mickeyf <mic...@thesweetoasis.com> wrote: > >> The fact that the USB Gadget IP address shows up and that you can connect >> via ssh indicates that the OS is basically working. You may not have >> corrupted anything, but are simply not using the right password (which I >> don't remember either, but which I do remember was either non-intuitive or >> hard to track down....) >> >> In the real world, BBBs and other devices will experience unexpected and >> unplanned power outages, should be designed, and up to a reasonable point >> are designed to survive them. I have both intentionally and unintentionally >> rudely removed power from BBBs many, many times (hundreds?) with no ill >> effects. >> >> On the other hand, I do recall a certain 4 year old famously saying 'But >> I've run out in the street lots of times and never been hit by a car, >> Daddy!" You may want to avoid tempting fate unnecessarily. >> >> In any case it is certainly quicker and easier to reflash a BBB than to, >> for example, rebuild an entire hard drive and reinstall a recent version of >> Windows on it. >> >> On Wednesday, April 20, 2016 at 9:52:58 PM UTC-7, William Hermans wrote: >>> >>> *Hey William,* >>>> >>>> *Yes, that's all very clear in hindsight. I do wish that I had looked >>>> up how to turn it off properly before I made the mistake. * >>>> >>>> *Thank you for the clarification on the kernel. It's hard to find >>>> up-to-date info.* >>>> >>>> *-Nate* >>>> >>> >>> Ok, so now that we have that clear ;) hehe. >>> >>> You have to treat this like you would any other computer. Except perhaps >>> the beaglebone is more fragile. Due to hardware costs, and the fact that >>> the software, that is specific to the beaglebone is written by various >>> members of the community. Who by the way do not get paid to do that. >>> >>> But you would shut down the BBB the same way you would shutdown your >>> laptop from the command line. >>> >>> $ sudo shutdown now -h >>> >>> *or* >>> >>> $ sudo halt >>> >>> There is also a button closest to the ethernet jack which triggers an >>> NMI through the PMIC, which should signal the processor to cleaning shut >>> down linux. The button furthest from the ethernet jack on the same side ( >>> left ) if I remember correctly is the reset button. So make sure not to >>> press that while the OS is running either. The effect would be similar to >>> pulling the power. >>> >>> On Wed, Apr 20, 2016 at 9:38 PM, Nathan Wheeler <wheele...@gmail.com> >>> wrote: >>> >>>> Hey William, >>>> >>>> Yes, that's all very clear in hindsight. I do wish that I had looked up >>>> how to turn it off properly before I made the mistake. >>>> >>>> Thank you for the clarification on the kernel. It's hard to find >>>> up-to-date info. >>>> >>>> -Nate >>>> >>>> On Wednesday, April 20, 2016 at 9:15:44 PM UTC-7, William Hermans wrote: >>>>> >>>>> So, question. If you removed the battery from your laptop, and then >>>>> ran your laptop with no battery, an just yanked the power cord out of the >>>>> wall to shut it down. What do you think would happen ? It's the same >>>>> difference, except it would possibly take many more attempts at corrupting >>>>> you laptop, before it did actually corrupt the file system. >>>>> >>>>> Also, it's running Debian wheezy with a 3.8.x kernel, not Angstrom. >>>>> Just so you know. RevC's all came with a *bone-47* 3.8 kernel. >>>>> >>>>> On Wed, Apr 20, 2016 at 9:04 PM, Nathan Wheeler <wheele...@gmail.com> >>>>> wrote: >>>>> >>>>>> Hey all, >>>>>> >>>>>> I did a search - maybe someone is better at it than I am and could >>>>>> help connect me to an explanation/solution? Anyway, here's what has >>>>>> happened: >>>>>> >>>>>> I got my board in the mail yesterday and connected it to my new >>>>>> MacBook Pro Retina (running OSX 10.11.3). I was able to ssh over USB >>>>>> after >>>>>> installing the included drivers and write/run code on the board. I didn't >>>>>> write anything special, just practiced loading a python example to the >>>>>> board. >>>>>> >>>>>> I didn't know that pulling the USB cable without turning the board >>>>>> off via the Power button could corrupt the eMMC onboard. I understand I >>>>>> should have read the manual, but I think this information needs to be >>>>>> included on any "quick start" info provided to beginners. (If they tell >>>>>> you >>>>>> how to turn it on, shouldn't they tell you how to safely turn it off?) I >>>>>> have a lot of experience with Arduino and mistakenly thought that I could >>>>>> unplug the BeagleBone from power without any other shutdown steps. >>>>>> >>>>>> So now, the board powers on and the user LEDs flash, and the board >>>>>> shows up as an external storage device on my laptop. But the IP address >>>>>> has >>>>>> changed to 198.168.7.1, and any attempts to ssh either result in a >>>>>> timeout >>>>>> or require password authentication. And the default passwords provided on >>>>>> Adafruit and other places are not working. >>>>>> >>>>>> So, my questions are: >>>>>> • How do I know if I've corrupted the data in the eMMC? Will the >>>>>> board act normally but not connect? >>>>>> • If I can't ssh via USB, will I be able to do so via ethernet, or >>>>>> should I just start over/do a restore of Angstrom? >>>>>> • Is Angstrom stiil the default distro, or are the boards shipping >>>>>> with Debian now? >>>>>> • Is this possibly an El Capitan issue? I read a little about that, >>>>>> but I downloaded and installed a HoRNDIS version that was supposed to fix >>>>>> the issue. >>>>>> >>>>>> Thanks for your help - I'm really looking forward to learning how to >>>>>> use this board and become part of the community. I build interactive >>>>>> interfaces for musical performance and am excited about the possibilities >>>>>> offered here. >>>>>> >>>>>> - Nate >>>>>> >>>>>> -- >>>>>> 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. >>>>>> To view this discussion on the web visit >>>>>> https://groups.google.com/d/msgid/beagleboard/bcdcae01-ee98-4900-b795-f5b372ded41f%40googlegroups.com >>>>>> <https://groups.google.com/d/msgid/beagleboard/bcdcae01-ee98-4900-b795-f5b372ded41f%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>> . >>>>>> 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. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/beagleboard/7b283842-bf9c-4ef9-9793-c9639d13810f%40googlegroups.com >>>> <https://groups.google.com/d/msgid/beagleboard/7b283842-bf9c-4ef9-9793-c9639d13810f%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>>> 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. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/e0b0ef1e-56fa-456b-8d18-ca76ec3ae512%40googlegroups.com >> <https://groups.google.com/d/msgid/beagleboard/e0b0ef1e-56fa-456b-8d18-ca76ec3ae512%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> 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. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORoJrpmMe1NOKRg1ouYpEOP0kqJjnVUftpcmhPmurSEe1g%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
