====== Cb3 A20-android System Boot From Sata ======

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//__About this Article__//
  * **Author**: james --- james@cubietech.com --- 2013/11/04 09:34
  * **Copyrights**: [[http://creativecommons.org/licenses/by-sa/3.0/|CC Attribution-Share Alike 3.0 Unported]]
  * **Contributors**: [[http://cubieboard.org/|Cubieboard Community]] : ...
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===== Copy the System File =====
At first , connect Cubietruck by USB ,and open terminal:
    $adb shell
  
So you will input the Android-Shell Command-Line,and see where the system file mounted:
    $mount
{{:tutorials:ct1:build_net01_069.png|}}

You can see the block /dev/block/system mount on /system,

then you connect SATA with Cubietruck,and see what block is the SATA:
    $ls /sys/devices/platform/sw_ahci.0/ata1/host0/target0:0:0/0:0:0:0/block
You will see the SATA block(maybe it's sdb, sdc or sdd,but it's no problem):

{{:tutorials:ct1:build_net01_072.png|}}

Now you know the block,use this command:
    $dd if=/dev/block/system of=/dev/block/sda(Your SATA block)
Just wait for about 1 minutes,it will success:

{{:tutorials:ct1:build_net01_073.png|}}

===== Modify the SDK =====
After you copy the system file to SATA,you should modify SDK:
    $cd V2.0_A20/android/devices/softwinner/sugar-cubietruck/ && ls
    $vim init.sun7i.rc
And "mount ext4 /dev/block/system" changes to "mount ext4 /dev/block/sda",like that:

{{:tutorials:ct1:build_net01_-work-cubietruck_android-android42-device-softwinner-sugar-cubietruck_074.png|}}

Save and quit,complie the android image.If you don't konw how to complie,refer to [[http://docs.cubieboard.org/tutorials/ct1/installation/cb3_a20-compiling_android_image_for_cubietruck|here]]

**After compile success,do this:**
  *Install the new image to Cubietruck.
  
  *Connect the SATA first( must first! If you don't do this it wouldn't boot)
  
  *Charge it with electricity,you will see it Boot from SATA.
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{{tag>Cubieboard Cubietruck}}
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