It is not a uSD but internal eMMC. And you can see from fdisk output boot flag is set. On Jan 20, 2015 10:44 AM, "Graham Haddock" <[email protected]> wrote:
> Did you set the "boot" bit on the 8gb flash card? > > The later versions of the OS can not see or boot from the uSD card unless > the "boot" bit is set. > > The "CCCCCC" string means that the BBB can not see the card, and is trying > to boot from > the serial port. > > --- Graham > > == > > On Tue, Jan 20, 2015 at 8:07 AM, <[email protected]> wrote: > >> So I got my 8gb flash, and resized original boards partition to be >> smaller than second board. So now the problem is I have flashed new board, >> and it will not boot up. I can mount and view both partitions correctly, >> and everything looks ok, but I only get "CCC" when trying to boot and >> viewing with FTDI cable. Any ideas? >> >> Disk /dev/mmcblk1: 3867 MB, 3867148288 bytes >> >> 4 heads, 16 sectors/track, 118016 cylinders, total 7553024 sectors >> >> Units = sectors of 1 * 512 = 512 bytes >> >> Sector size (logical/physical): 512 bytes / 512 bytes >> >> I/O size (minimum/optimal): 512 bytes / 512 bytes >> >> Disk identifier: 0x00000000 >> >> >> >> Device Boot Start End Blocks Id System >> >> /dev/mmcblk1p1 * 2048 198655 98304 e W95 FAT16 ( >> LBA) >> >> /dev/mmcblk1p2 198656 7571455 3686400 83 Linux >> >> >> >> On Tuesday, December 2, 2014 at 11:20:13 PM UTC-5, Graham wrote: >>> >>> I think you will have two problems. >>> >>> First, you can not put a 4GB file on a 4 GB card, because there must >>> also be room for the >>> Linux OS, and depending on the version, this can be another 1 GB, or >>> more. >>> >>> Second problem is that when you install a 2 GB image on a 4 GB card, the >>> partition as >>> installed is typically about 2 GB, and the rest of the card can not be >>> used, until you >>> expand the partition to the full size of the card. >>> >>> So, for working with the 4 GB eMMC version of the Beaglebone Black, you >>> must use >>> at least an 8 GB card. I use 16 GB, so that there is room for about >>> three images >>> that are not compressed. You can not go larger than 32 GB at this time. >>> >>> --- Graham >>> >>> == >>> >>> On Tuesday, December 2, 2014 5:57:16 PM UTC-6, [email protected] >>> wrote: >>>> >>>> So in that other thread, it was instructed to use the same dd command >>>> "dd if=/dev/mmcblk1 of=/mnt/BeagleBoneBlack-eMMC-image-$RANDOM.img >>>> bs=10M" to create image, so why would mine only end up 2GB instead of 4GB? >>>> I cannot follow those instructions exactly, as I only have a 4GB SD card, >>>> so maybe this is the problem since the eMMC is 4GB also. >>>> >>>> On Tuesday, December 2, 2014 5:22:47 PM UTC-5, [email protected] >>>> wrote: >>>>> >>>>> there is another thread here *Duplicate BeagleBone black setup* >>>>> <https://groups.google.com/forum/embed/?place=forum/beagleboard&showsearch=true&showpopout=true&showtabs=true&hideforumtitle=true&parenturl=http%3A%2F%2Fwww.beagleboard.org%2FCommunity%2FForums#%21category-topic/beagleboard/beaglebone-black/hKuAggxij40> >>>>> dated >>>>> Nov 28, where you will find a solution to your problem. >>>>> Good luck. >>>>> Jan >>>>> >>>>> On Wednesday, December 3, 2014 6:32:08 AM UTC+11, >>>>> [email protected] wrote: >>>>> >>>>>> I am trying to clone an existing BBB, so my first try is using the >>>>>> scripts on http://elinux.org/BeagleBone_ >>>>>> Black_Extracting_eMMC_contents . So first thing I notice is the >>>>>> .img file created was only 2GB, whereas this is a newer BBB that has 4GB >>>>>> eMMC. So when I updated script to write the img to new BBB, it no longer >>>>>> boots from eMMC. i would like to make exact copies including uENV.txt, >>>>>> etc. Does anyone know why this is not working? >>>>>> >>>>>> The read command script is >>>>>> >>>>>> #!/bin/sh >>>>>> echo timer > /sys/class/leds/beaglebone\:green\:usr0/trigger >>>>>> dd if=/dev/mmcblk1 of=/mnt/BeagleBoneBlack-eMMC-image-$RANDOM.img >>>>>> bs=10M >>>>>> sync >>>>>> echo default-on > /sys/class/leds/beaglebone\:green\:usr0/trigge >>>>>> >>>>> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to a topic in the >> Google Groups "BeagleBoard" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/beagleboard/u12eEHlfvmE/unsubscribe. >> To unsubscribe from this group and all its topics, 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.
