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How to Run the Linux Filesystem on Juno r0 with an USB Flash Disk Plugging in USB 2.0

Hi, 

I'm using Juno r0 and want to run Linux on that.

But there is something wrong when I power up Juno. 

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ARM V2M-Juno Boot loader v1.0.0
HBI0262 build 616
ARM V2M_Juno Firmware v1.1.8
Build Date: Jun 17 2014
Time : 17:01:54
Date : 20:07:2068
Cmd>
Powering up system...
Switching on ATXPSU...
PMIC RAM configuration (pms_v103.bin)...
MBtemp : 28 degC
Configuring motherboard (rev B, var B)...
IOFPGA image \MB\HBI0262B\io_b115.bit
IOFPGA config: PASSED
OSC CLK config: PASSED
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

After reading getting stared guide, I erase the flash as follows: (I don't have an USB cable right now)

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Cmd> flash
Switching on main power...
PMIC RAM configuration (pms_v104.bin)...
IOFPGA config: PASSED
Flash> eraseall
Erasing flash device
Erasing Flash
........................
Erasing Flash
....
Flash> exit
Switching off ATX PSU.
Cmd>
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

But there still is something wrong when I reboot.

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Cmd> reboot
Powering up system...
Switching on ATXPSU...
PMIC RAM configuration (pms_v103.bin)...
MBtemp : 28 degC
Configuring motherboard (rev B, var B)...
IOFPGA image \MB\HBI0262B\io_b115.bit
IOFPGA config: PASSED
OSC CLK config: PASSED
Configuring SCC registers...
Writing SCC 0x0000005C with 0xFFFFFFFF
Writing SCC 0x00000100 with 0x801F1000
Writing SCC 0x00000104 with 0x0000F100
Writing SCC 0x00000108 with 0x801B1000
Writing SCC 0x0000010C with 0x0000D100
Writing SCC 0x000000F8 with 0x0BEC0000
Writing SCC 0x00000054 with 0x0003FFFE
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Therefore, I copy a file system with an USB Flash disk from another USB Flash disk of another Juno which has run perfectly. But I can't find any help to run the Linux with USB Flash disk instead of the Flash inside Juno. 

Please let me know the right operation to make it work on USB Flash disk.

Regards

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