DART-6UL eMMC

DART-6UL - eMMC

NOTE:
Make sure you booted from sdcard with imx6ul-var-dart-sd_emmc.dtb selected

NOTE:
nand-recovery supports flashing of eMMC without the requirement of the process below. Just run android-emmc.sh on the command line.

• Check that the device is up.

$ dmesg | grep mmcblk1

• Output example:

mmcblk1: mmc1:0001 MMC04G 3.52 GiB 
mmcblk1boot0: mmc1:0001 MMC04G partition 1 16.0 MiB
mmcblk1boot1: mmc1:0001 MMC04G partition 2 16.0 MiB
mmcblk1rpmb: mmc1:0001 MMC04G partition 3 128 KiB
 mmcblk1: unknown partition table
 mmcblk1boot1: unknown partition table
 mmcblk1boot0: unknown partition table

Select the eMMC device number. Number will change if SD card is in.

• Create partition

$ fdisk /dev/mmcblk1

Output example:

Device contains neither a valid DOS partition table, nor Sun, SGI, OSF or GPT disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that the previous content
won't be recoverable.


The number of cylinders for this disk is set to 115456.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)

Create msdos Boot partition:

n
p
1
8192
24575
t
c

Output example:

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-115456, default 1): 8192
Last cylinder or +size or +sizeM or +sizeK (8192-115456, default 115456): 24575

Command (m for help): t
Selected partition 1
Hex code (type L to list codes): c
Changed system type of partition 1 to c (Win95 FAT32 (LBA))

Create ext3 partition:

n
p
2
24576

Output example:

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 2
First cylinder (1-115456, default 1): 24576
Last cylinder or +size or +sizeM or +sizeK (24576-115456, default 115456): Using default value 115456

Print the partition table:

p

Output example:

Command (m for help): p

Disk /dev/mmcblk1: 3783 MB, 3783262208 bytes
4 heads, 16 sectors/track, 115456 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

        Device Boot      Start         End      Blocks  Id System
/dev/mmcblk1p1            8192       24575      524288   c Win95 FAT32 (LBA)
/dev/mmcblk1p2           24576      115456     2908192  83 Linux

Write and exit:

w

Output example:

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table
 mmcblk1: p1 p2