> > *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/CALHSORoXLDJ6M0-RfkJgBSTOgfKN9Zzu9_yntgQTNAH-ZmmdEA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
