I agree.I suspect that the eMMC is actually set to 4bit in some of the kernels and there may be other issues going on as well..
Gerald On Mon, Dec 16, 2013 at 12:52 PM, John Syne <[email protected]> wrote: > > > From: Gerald Coley <[email protected]> > Reply-To: <[email protected]> > Date: Monday, December 16, 2013 at 6:34 AM > To: "[email protected]" <[email protected]> > Cc: <[email protected]> > Subject: Re: [beagleboard] Boot Android from eMMC without Micro SD ?? > > eMMC runs at 48MHZ. > uSD runs at 48MHz. > eMMC is 8bit. > uSD is 4bit. > > Hi Gerald, > > Based on the specs, you would think that eMMC would run faster, but it > doesn’t. Run the following Linux command to test the speed of each device: > sudo hdparm –tT /dev/mmc0blk0p1 > > SDCard 21MB/s > eMMC 12MB/s > > This doesn’t make sense, but perhaps there is something else going on. > > Regards, > John > > > Gerald > > > > On Mon, Dec 16, 2013 at 8:29 AM, Efecan Yilmaz > <[email protected]>wrote: > >> I'm not an expert but I think, If you want speed, you should use an SD >> cards like this: >> >> >> http://www.samsung.com/uk/consumer/memory-cards-hdd-odd/memory-cards-accessories/micro-sd-plus-accessories/MB-MPAGA/EU?subsubtype=micro-sd-plus-accessories >> >> or something which has min 30 mb/s read speed. I'm using the one in the >> link and my Beaglebone is working without a problem with TI's Android >> image. Don't waste your time trying to boot Beaglebone from eMMC. If you >> use a high speed SD card you'll get better performance. >> >> >> On Monday, 16 December 2013 08:22:58 UTC+2, [email protected] wrote: >>> >>> Hi Gerald, >>> >>> Could you please tell us how this is possible as i also want to flash >>> android or even ubuntu desktop on eMMC. b'coz i want to speed up the OS. I >>> have ubuntu on sdCard but it is very slow. >>> >>> On Monday, September 2, 2013 5:19:33 PM UTC+5:30, Gerald wrote: >>> >>>> Oh, I understand totally. But, the idea is to make sure the board is OK >>>> and functioning, so that is what I suggest going back to the factory image >>>> to make sure. Then work the Android issue. I don't know of anyone that has >>>> flashed the eMMC with an Android image. everything i have seen so far is SD >>>> card booting only. But it should be possible. >>>> >>>> Gerald >>>> >>>> >>>> >>>> On Mon, Sep 2, 2013 at 3:50 AM, Efecan Yilmaz <[email protected]>wrote: >>>> >>>>> Hi Gerald. Thanks for the answer. But I'm not trying to boot Android >>>>> from SD card. I'm trying to flash Android files into onboard eMMC. I want >>>>> to boot Android without SD card. >>>>> >>>>> >>>>> On Thursday, 29 August 2013 17:29:52 UTC+3, Gerald wrote: >>>>> >>>>>> Did you look here? >>>>>> >>>>>> http://circuitco.com/support/index.php?title=Android >>>>>> >>>>>> Gerald >>>>>> >>>>>> >>>>>> >>>>>> On Thu, Aug 29, 2013 at 9:17 AM, Efecan Yilmaz >>>>>> <[email protected]>wrote: >>>>>> >>>>>>> I'm trying to flash Android into eMMC. I wrote an Angstrom image >>>>>>> into an SD card. I booted BBB wtih that SD card. I create three >>>>>>> partions on >>>>>>> eMMC for Android via terminal in Angstrom. From this point, I'm not sure >>>>>>> which files I must copy to eMMC's boot and rootfs partitions. And I >>>>>>> think I >>>>>>> must modify some files because I used an image which runs on SD card (I >>>>>>> think I must change mmcblk0 references to mmcblk1). Long story short: >>>>>>> >>>>>>> 1) Which files I need to copy to eMMC's which partitions? >>>>>>> 2) Which files should I modify for my image to run on eMMC? (mmcblk0 >>>>>>> to mmcblk1 problem) >>>>>>> >>>>>>> If you can help me, I'll be grateful :) >>>>>>> And sorry for my English :) >>>>>>> >>>>>>> -- >>>>>>> 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/groups/opt_out. >>>>>>> >>>>>> >>>>>> -- >>>>> 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/groups/opt_out. >>>>> >>>> >>>> -- >> 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/groups/opt_out. >> > > -- > 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/groups/opt_out. > > -- > 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/groups/opt_out. > -- 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/groups/opt_out.
