Update: uMon is now booting from SD

[Ed Sutter]

On 7/5/2015 6:46 PM, Chris Johns wrote:
> On 5/07/2015 4:19 am, Ed Sutter wrote:
>> Ok, I managed to get it to boot using only Linux for formatting the card.
>> It wasn't working for me until I just read your email and realized I did
>> not mark
>> the partition active.  After doing that it booted!
>> So here are the steps I walked through
>> (extracted from: http://forum.xda-developers.com/showthread.php?t=502095) :
>>
>> 1. Verify the partition that the SD card installs as:
>>       - cat /proc/paritions (without the uSD)
>>       - Insert uSD card
>>       - cat /proc/paritions (note the difference)
>> Using /dev/sdc as our partition:
>> 2. sudo fdisk /dev/sdc
>>      - delete all paritions with 'd' command (d1/d2/d3/d4) as needed
>>      - use 'n' command to create partition 1
>>      - use 't' command to relabel partition 1 to 'c'
>>      - use 'a' command to make the parition active
>>      - use 'p' to show something like:
>>
>>     Device Boot      Start         End      Blocks   Id  System
>> /dev/sdc1   *        2048     3932159     1965056    c  W95 FAT32 (LBA)
>>
>>       - use 'w' to write to the card
>>
>> 3. Run sudo mkfs.vfat /dev/sdc1
>> 4. Mount /dev/sdc1 as /media/boot (or whatever)
>> 5. Copy MLO to /media/boot
>> 6. Run sync; unmount /media/boot
>> 7. Put card in BBB, reset with boot button depressed.
>>
> A simple request to place in the doco early is to create a root
> partition only as large as you need and not use whole disk size in the
> root partition. Users should be encouraged to add other partitions they
> can mount as read/write to store a kernel and/or user data.
>
> Chris
> _______________________________________________
>
Yep, for sure... my example above was lame...
Functionally ok, but not considering the fact that the SD card will have
other "stuff".  Also, Chris, IIRC, you mentioned that FAT-booting may not be
the right way to go ultimately.  So, for now at least, it will be good 
to cover
both modes of booting until we get a better grip on which approach to
take.
Jarielle, I can add detail on raw mode to whatever you initially write up
if you want me to...
Ed