Robert, I'm using a 5V/2A power supply, and have tried the same process with the identical setup across multiple boards (same power supply, same uSD). I'm not seeing the power supply dip below 5V at all during the flashing process; it's steady at 5.20V throughout the process. Maybe that's on the high end, but the spec says 5.0V +/- 0.25 is acceptable.
During the few months of running there was very little writing and reading from the eMMC. After boot and initialization, only log files would change, and there shouldn't have been many log writes. The nand should be well within its wear/endurance limit. I'd like to write this failure off as an odd occurrence, but I'm trying to set up a few boards that will be difficult to reach and will need to be very reliable. Is there anything I can do to track down the cause of this problem and be reasonably sure it won't happen on other boards? Thanks, Chris On Wednesday, February 3, 2016 at 4:03:28 PM UTC-5, RobertCNelson wrote: > > On Wed, Feb 3, 2016 at 2:49 PM, <[email protected] <javascript:>> wrote: > > Thanks for your help. > > > > I'm now trying to re-flash the eMMC, but every time I try, after a few > > minutes all LEDs blink in what looks like an error pattern (two short > blinks > > then pause). I tried using the same uSD to flash another board, which > worked > > fine. > > > > Attached is the serial output from the failing board while trying to > flash > > the eMMC. > > > > This seems to point to a hardware failure -- what is the failure rate of > the > > eMMC components? > > remember eMMC/microSD are just managed nand underneath... > > They don't last forever.. > > But i'd double check your power supply.. During this stage: > > Copying: /dev/mmcblk0p1 -> /dev/mmcblk1p1 > [ 39.436176] EXT4-fs (mmcblk1p1): mounted filesystem with ordered > data mode. Opts: (null) > rsync: / -> /tmp/rootfs/ > > You'll reach max current draw pretty quickly.. > > As cpu get's maxed out, along with reading /dev/mmcblk0p1 and writing > /dev/mmcblk1p1... > > Regards, > > -- > Robert Nelson > https://rcn-ee.com/ > -- 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.
