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{{GD Template Impl}}
[[File:X820-V3.0-IMG-4498.jpg|thumb|right|x820 v3.0 version raspberry pi sdd/hdd storage board]]
[[File:X820-V3.0-IMG-4501.jpg|thumb|right|x820 v3.0 version raspberry pi sdd/hdd storage board]]
[[File:X820-V3.0-IMG-4511-1.jpg|thumb|right|x820 v3.0 version raspberry pi sdd/hdd storage board]]
[[File:X820-IMG-2433.jpg|thumb|right|x820 V1.3 raspberry pi sdd/hdd storage board]]
[[File:X820-IMG-2432.jpg|thumb|right|x820 V1.3 raspberry pi sdd/hdd storage board]]
[[File:Metail-case-IMG-3050.jpg|thumb|right|Metal Case X820 V1.3 or X800 SSD Storage expansion board]]
[[File:Metail-case-IMG-3049.jpg|thumb|right|Metal Case X820 V1.3 or X800 SSD Storage expansion board]]
==Note==
'''AMAZON JP''': https://www.amazon.co.jp/dp/B07MTC5YPR
Please send your issue information with <span style="color:red;font-weight:bold">order numbers and purchase link</span> to our support email: support@geekworm.com if you need after-sale support, that will do great help to solve the problem quickly, thanks in advance.
What do you need to use Raspberry Pi X820 V3.0 2.5 inch SATA Storage Board?
# A Raspberry Pi board(Pi 3B+, 3B, 2B, B+)
# A DC 5V 4A Power Supply (Please use high quality power supply)
# A 2.5 inch SATA hard disk drives (HDD) or solid-state drive (SSD)
# A X820 V3.0 use Metal Case Kit(optional)
<span style="color:red;font-weight:bold">Note: 1. when using our X820 metal case, the Max. compatible thickness of the 2.5" SATA SSD/HDD is 10.4mm/0.41inch.
(The stander 2.5" SATA SSD/HDD is 9.2mm/0.36inch). 2. USB mass storage boot is available on Raspberry Pi 3B, 3B+, 3A+, and 2B v1.2 only.</span>
'''USB mass storage device boot'''
Please refer to https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md
==Installation Video==
Geekworm Video: https://youtu.be/I1nnjh9HvGI
Customer Video 1: https://youtu.be/oYQWG9MPuY0
Customer Video 2: https://youtu.be/IGxRA_JgoRc
==Overview==
* The X820 expansion board provides a complete storage solution for raspberry pi, only 2.5 inch SATA interface HDD/SDD hard disk is suitable for X820 Board;
* For Use With: Raspberry Pi 3 Model B/ 2B / B+
* Upgraded to USB3.1 Gen1 port; (SupportS USB 3.0) w/ high quality USB 3.0 Cable ( Lenght- 80cm/2.62inch; Diameter- 5.96mm/0.19inch)
* Operating System: All Raspberry Pi operating systems
* Support boot from USB mass storage device, '''USB mass storage boot is available on Raspberry Pi 3B, 3B+, 3A+, and 2B v1.2 only.''' please refer to [[#How to boot from a USB Mass storage device on a raspberry pi 3]]:
==V3.0 Upgrade Features==
* Using patch process to improve the quality of the X820 V3.0 Board;
* Add Powers button switch on the board to control the power supply.
* Add upgraded external 5V 2A power output USB port for external device such as cellphone and other device, of course. User can power the raspberry pi via this USB port when GPIO pins are occupied by other expansion board.
* Use upgrade Main control chip to solve the problem that the 'reboot' command is not supported in the V1.3 function.
* User can directly use the X820 V3.0 board as a mobile hard disk even if you don't power it (tested; with our USB3.0 cable or use a good quality and relatively short USB3.0 cable); PS: In the V1.3 version, you need to power the X820 at the same time as when you use the X820 V1.3 board as a mobile Hard disk;
* The HDMI adapter has been removed, which reduces the difficulty of installation; it also facilitates the design and installation of the accessory enclosure;
* Two kinds of power supply modes are supported; One of mode is that power the raspberry pi via 2 pin cable by connecting to GPIO2 (5V) and GPIO3(GND) pins, the other one of mode is power the raspberry pi via USB port; PS: DON'T USE THE TWO KIND MODES AT THE SAME TIME;
==Diagram of X820 V3.0==
[[File:X820-v3.0 DWG.jpg]]
==Features==
* Supports upto 4TB 2.5-inch SATA hard disk drives (HDD) / solid-state drive (SSD) (Theoretically it can work with 6TB or 8TB as well. But actually we do not test the X820 board with 6tb or 8tb HDD, you can have a try.)
* Ideal storage solution for Raspberry Pi
* USB 3.1 Gen1 to SATA 6Gb/s Bridge Controller
* USB 2.0 connectivity offers plug-and-play functionality on your Raspberry Pi
* Quick file transfer with high-speed USB 3.0 connectivity from a PC or a Mac
* External Self Powered - Do not require power from Raspberry Pi USB port
* Powers the Raspberry Pi - no additional power supply for RPi
* Duplicated Raspberry Pi HDMI port
==Specification==
* Power supply: AC 100 - 240V input 50 / 60Hz, 5V DC 4A output
* DC Power Plug Size : 5.5*2.5mm
* Output Ports: 1 x HDMI, 1 x USB , 1 x DC jack
'''<span style="color:red;font-weight:bold">Important Note: Please use high quality DC 5V 4A power supply, the best choice is to buy the DC 5V 4A power supply that Geekworm provided. If you get low quality power supply to use, it may probably will damage your 2.5 inch HDD/SSD.</span>'''
==Notice==
* DO NOT APPLY POWER TO YOUR RASPBERRY PI VIA THE PI's MICRO USB SOCKET!
==Packing List==
* 1 x X820 Expansion Board
* 1 x USB 3.0 cable (Length: 80cm/ 2.62 inch)
* 1 x USB connector
* 1 x 2 Pin Power Connection Wire(Cable: 10cm)
* 1 x HDMI Adapter
* 1 x Install Screws pack
==Some Tips==
*[[Properly Mount USB Storage on Raspberry Pi]]
*[[Auto Mount an NTFS USB Drive on Raspberry Pi]]
==Installation Guide(V3.0 Version)==
[[File:V3.0 Installation Guide-w800.jpg]]
Video Guide from our friends: https://www.youtube.com/watch?v=GxNKpuhVsX8
== Pictures==
<gallery>
X820-IMG-2437.jpg|
x820-IMG-2439-1.jpg|
</gallery>
== Matching Metal Case for X820 V3.0 Version (Recommend)==
Please refer to [[X820 Metal Case V3.0 Version]]
== Matching Metal Case for X820 V1.3 Version==
Please refer to [[X820 Metal Case V1.3 Version]]
==FAQ==
Q: Don't detect HDD/SDD?
*This is a complicated question, but we can check it from these points. Please refer to '''[[How to check the X820]]'''
Q: Do i need an external power source supplying for x820 board?
* Yes, here is the specification: 5V and 4A with a 5.5mm barrel connector.
Q: With a hard drive installed, could you eleminate the need for a micro sd card and boot straight from drive?
* Please refer to the "How to boot from a USB Mass storage device on a raspberry pi 3" below.
Q: What to do if the X820 board could not detect the HDD or SSD?
* (1) At first, please use the high quality power supply adapter, the hard disk will not be recognized if you use the low quality power supply, as the current of this power supply is not enough.
* (2) Please run 'lsusb' command under linux terminal, and save the screenshot of the result, then send it to our email: support@geekworm.com, then we will figure out your problem together.
* (3) Please remember to send us your '''order number and the website''' you ordered to us when you contact us for the X820 problem by email: support@geekworm.com.Thank you!
Q: What is a recommended HDD for this board?
* Basically it can support all the 2.5-inch HDD with SATA 2 or STATA 3 interface.
Q: How to do if I don't like the blue light on the power switch?
* It is ok to disable the blue light on the power switch, you just need to pull out the white cable. Please refer to the picture.
<gallery>
Turn-off-led-IMG-20181108-095055.jpg|Caption1
</gallery>
Q: Why can't boot from the SSD or HDD?
* Customer Feedback 1: I have followed the same steps you provided and my ssd is not able to boot. I have tried again with a normal sata hard drive and it works fine. My original ssd (Patriot Burst 240gb) draws too much power. Thus, do not boot.
Q:Can you stack the module with itself? is the usb cable and bridge crossover?
*Theoretically, you can stack the X820 module to use by USB cable.
But you need to solve the problem of how to power them, if you stack them together, it may need more power. Actually we do not test on how to stack them together, hope to get your understanding!
Q: Why the voltage warnings shows on my Pi?
Customer feeback: The board works as advertised with the 4a power supply they recommend but seems to lie really close to the voltage limit. I get a number of voltage warnings while using until I stopped using the KVM switch (which had a separate power supply) and just used a USB keyboard. Outside of that, assembled just fine and was able to configure a SSD 2.5 drive without issue.
* To a large extent, we doubt that voltage warnings maybe caused by the power supply.
* Our power supply has an idling output voltage of 5.2V , even when the working current reaches 4A, the output voltage will be around 4.9V, this is the reason why the Raspberry Pi system does not have undervoltage.
* So we suggest that you can measure the output voltage of your power supply when under load your device. Please test directly the voltage value between GND and 5V PIN.
* We found that many power supplies on the market are known as 5V 4A output, but when use this power adapter at high current output , the voltage often drops very badly, with only about 4.7V or lower than 4.7V.
Q:Is there really a 4tb limit? Will this X820 board not work with 6tb or 8tb?
* Theoretically it can work with 6tb or 8tb as well. But actually we do not test the X820 board with 6tb or 8tb HDD, hope to get your understanding!
Q: What is the pinout for the PWR Switch?
A: Please refer to here: [http://www.raspberrypiwiki.com/index.php/PH2.0_Connectors_for_External_Power_Switch PH2.0 Connectors for External Power Switch]
Q: Where can I buy this product?
* Please visit our [https://geekworm.com/collections/best-sellings/products/raspberry-pi-x820-2-5-inch-sata-storage-board-dc-5v-4a-power-supply-metal-case-kit Geekworm official store]
For more questions, please refer to blog '''[https://geekworm.com/blogs/raspberry-pi/faq-of-raspberry-pi-x820-v3-0-usb-3-0-2-5-sata-hdd-ssd-storage-expansion-board FAQ of Raspberry Pi X820 V3.0 USB 3.0 2.5" SATA HDD/SSD Storage Expansion Board]'''
==Customer Video==
1. https://youtu.be/JsrjKcfi1mg
2.https://youtu.be/IGxRA_JgoRc
==How to boot from a USB Mass storage device on a raspberry pi 3==
This tutorial explains how to boot your Raspberry Pi 3 from a USB mass storage device such as a flash drive or USB hard disk. Be warned that this feature is experimental and does not work with all USB mass storage devices. See this blog post from Gordon Hollingworth for an explanation of why some USB mass storage devices don't work, as well as some background information.
===Program USB Boot Mode===
Before a Raspberry Pi 3 will boot from a mass storage device, it needs to be booted from an SD card with a config option to enable USB boot mode. This will set a bit in the OTP (One Time Programmable) memory in the Raspberry Pi SoC that will enable booting from a USB mass storage device. Once this bit has been set, the SD card is no longer required. Note that any change you make to the OTP is permanent and cannot be undone.
You can use any SD card running Raspbian or Raspbian Lite to program the OTP bit. If you don't have such an SD card then you can install Raspbian or Raspbian Lite in the normal way - see [https://www.raspberrypi.org/documentation/installation/installing-images/README.md installing images].
* First, prepare the ''/boot'' directory with up to date boot files:
sudo apt-get update
sudo apt-get upgrade
The above step is not required if you use the 2017-04-10 release of Raspbian / Raspbian Lite or later, <span style="color:red;">(PS: use or update the last Raspbian version is always recommend)</span>
* Then enable USB boot mode with this code:
echo program_usb_boot_mode=1 | sudo tee -a /boot/config.txt
sudo reboot
This adds ''program_usb_boot_mode=1'' to the end of ''/boot/config.txt''. Reboot the Raspberry Pi with ''sudo reboot'', then check that the OTP has been programmed with:
vcgencmd otp_dump | grep 17:
17:3020000a
Ensure the output 0x3020000a is shown. If it is not, then the OTP bit has not been successfully programmed.
If you wish, you can remove the ''program_usb_boot_mode'' line from config.txt, so that if you put the SD card in another Raspberry Pi, it won't program USB boot mode. Make sure there is no blank line at the end of config.txt. You can edit config.txt using the nano editor using the command ''sudo nano /boot/config.txt'', for example.
===Prepare the operating system image ===
Starting with the 2017-04-10 release of Raspbian you can install a working Raspbian system to a USB mass storage device by copying the operating system image directly onto your USB device, in the same way that you would for an SD card. To perform this step, follow the instructions [https://www.raspberrypi.org/documentation/installation/installing-images/README.md HERE], remembering to select the drive that corresponds to your USB mass storage device.
Once you have finished imaging your USB mass storage device, remove it from your computer and insert it into your Raspberry Pi 3.
'''[Boot your Raspberry Pi 3 from the USB mass storage device]'''
Attach the USB mass storage device to your Raspberry Pi 3 and power it up. After between five and ten seconds the Raspberry Pi 3 should begin booting, and display the rainbow splash screen on an attached screen.
Please refer to here: [https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md USB mass storage device boot]
==Document==
Chinese User Manual: [[File:X820-V3.0Guide-CN.pdf]]
<comments />
[[Category:Product Manual]]
[[Category:Raspberry pi]]
[[File:X820-V3.0-IMG-4498.jpg|thumb|right|x820 v3.0 version raspberry pi sdd/hdd storage board]]
[[File:X820-V3.0-IMG-4501.jpg|thumb|right|x820 v3.0 version raspberry pi sdd/hdd storage board]]
[[File:X820-V3.0-IMG-4511-1.jpg|thumb|right|x820 v3.0 version raspberry pi sdd/hdd storage board]]
[[File:X820-IMG-2433.jpg|thumb|right|x820 V1.3 raspberry pi sdd/hdd storage board]]
[[File:X820-IMG-2432.jpg|thumb|right|x820 V1.3 raspberry pi sdd/hdd storage board]]
[[File:Metail-case-IMG-3050.jpg|thumb|right|Metal Case X820 V1.3 or X800 SSD Storage expansion board]]
[[File:Metail-case-IMG-3049.jpg|thumb|right|Metal Case X820 V1.3 or X800 SSD Storage expansion board]]
==Note==
'''AMAZON JP''': https://www.amazon.co.jp/dp/B07MTC5YPR
Please send your issue information with <span style="color:red;font-weight:bold">order numbers and purchase link</span> to our support email: support@geekworm.com if you need after-sale support, that will do great help to solve the problem quickly, thanks in advance.
What do you need to use Raspberry Pi X820 V3.0 2.5 inch SATA Storage Board?
# A Raspberry Pi board(Pi 3B+, 3B, 2B, B+)
# A DC 5V 4A Power Supply (Please use high quality power supply)
# A 2.5 inch SATA hard disk drives (HDD) or solid-state drive (SSD)
# A X820 V3.0 use Metal Case Kit(optional)
<span style="color:red;font-weight:bold">Note: 1. when using our X820 metal case, the Max. compatible thickness of the 2.5" SATA SSD/HDD is 10.4mm/0.41inch.
(The stander 2.5" SATA SSD/HDD is 9.2mm/0.36inch). 2. USB mass storage boot is available on Raspberry Pi 3B, 3B+, 3A+, and 2B v1.2 only.</span>
'''USB mass storage device boot'''
Please refer to https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md
==Installation Video==
Geekworm Video: https://youtu.be/I1nnjh9HvGI
Customer Video 1: https://youtu.be/oYQWG9MPuY0
Customer Video 2: https://youtu.be/IGxRA_JgoRc
==Overview==
* The X820 expansion board provides a complete storage solution for raspberry pi, only 2.5 inch SATA interface HDD/SDD hard disk is suitable for X820 Board;
* For Use With: Raspberry Pi 3 Model B/ 2B / B+
* Upgraded to USB3.1 Gen1 port; (SupportS USB 3.0) w/ high quality USB 3.0 Cable ( Lenght- 80cm/2.62inch; Diameter- 5.96mm/0.19inch)
* Operating System: All Raspberry Pi operating systems
* Support boot from USB mass storage device, '''USB mass storage boot is available on Raspberry Pi 3B, 3B+, 3A+, and 2B v1.2 only.''' please refer to [[#How to boot from a USB Mass storage device on a raspberry pi 3]]:
==V3.0 Upgrade Features==
* Using patch process to improve the quality of the X820 V3.0 Board;
* Add Powers button switch on the board to control the power supply.
* Add upgraded external 5V 2A power output USB port for external device such as cellphone and other device, of course. User can power the raspberry pi via this USB port when GPIO pins are occupied by other expansion board.
* Use upgrade Main control chip to solve the problem that the 'reboot' command is not supported in the V1.3 function.
* User can directly use the X820 V3.0 board as a mobile hard disk even if you don't power it (tested; with our USB3.0 cable or use a good quality and relatively short USB3.0 cable); PS: In the V1.3 version, you need to power the X820 at the same time as when you use the X820 V1.3 board as a mobile Hard disk;
* The HDMI adapter has been removed, which reduces the difficulty of installation; it also facilitates the design and installation of the accessory enclosure;
* Two kinds of power supply modes are supported; One of mode is that power the raspberry pi via 2 pin cable by connecting to GPIO2 (5V) and GPIO3(GND) pins, the other one of mode is power the raspberry pi via USB port; PS: DON'T USE THE TWO KIND MODES AT THE SAME TIME;
==Diagram of X820 V3.0==
[[File:X820-v3.0 DWG.jpg]]
==Features==
* Supports upto 4TB 2.5-inch SATA hard disk drives (HDD) / solid-state drive (SSD) (Theoretically it can work with 6TB or 8TB as well. But actually we do not test the X820 board with 6tb or 8tb HDD, you can have a try.)
* Ideal storage solution for Raspberry Pi
* USB 3.1 Gen1 to SATA 6Gb/s Bridge Controller
* USB 2.0 connectivity offers plug-and-play functionality on your Raspberry Pi
* Quick file transfer with high-speed USB 3.0 connectivity from a PC or a Mac
* External Self Powered - Do not require power from Raspberry Pi USB port
* Powers the Raspberry Pi - no additional power supply for RPi
* Duplicated Raspberry Pi HDMI port
==Specification==
* Power supply: AC 100 - 240V input 50 / 60Hz, 5V DC 4A output
* DC Power Plug Size : 5.5*2.5mm
* Output Ports: 1 x HDMI, 1 x USB , 1 x DC jack
'''<span style="color:red;font-weight:bold">Important Note: Please use high quality DC 5V 4A power supply, the best choice is to buy the DC 5V 4A power supply that Geekworm provided. If you get low quality power supply to use, it may probably will damage your 2.5 inch HDD/SSD.</span>'''
==Notice==
* DO NOT APPLY POWER TO YOUR RASPBERRY PI VIA THE PI's MICRO USB SOCKET!
==Packing List==
* 1 x X820 Expansion Board
* 1 x USB 3.0 cable (Length: 80cm/ 2.62 inch)
* 1 x USB connector
* 1 x 2 Pin Power Connection Wire(Cable: 10cm)
* 1 x HDMI Adapter
* 1 x Install Screws pack
==Some Tips==
*[[Properly Mount USB Storage on Raspberry Pi]]
*[[Auto Mount an NTFS USB Drive on Raspberry Pi]]
==Installation Guide(V3.0 Version)==
[[File:V3.0 Installation Guide-w800.jpg]]
Video Guide from our friends: https://www.youtube.com/watch?v=GxNKpuhVsX8
== Pictures==
<gallery>
X820-IMG-2437.jpg|
x820-IMG-2439-1.jpg|
</gallery>
== Matching Metal Case for X820 V3.0 Version (Recommend)==
Please refer to [[X820 Metal Case V3.0 Version]]
== Matching Metal Case for X820 V1.3 Version==
Please refer to [[X820 Metal Case V1.3 Version]]
==FAQ==
Q: Don't detect HDD/SDD?
*This is a complicated question, but we can check it from these points. Please refer to '''[[How to check the X820]]'''
Q: Do i need an external power source supplying for x820 board?
* Yes, here is the specification: 5V and 4A with a 5.5mm barrel connector.
Q: With a hard drive installed, could you eleminate the need for a micro sd card and boot straight from drive?
* Please refer to the "How to boot from a USB Mass storage device on a raspberry pi 3" below.
Q: What to do if the X820 board could not detect the HDD or SSD?
* (1) At first, please use the high quality power supply adapter, the hard disk will not be recognized if you use the low quality power supply, as the current of this power supply is not enough.
* (2) Please run 'lsusb' command under linux terminal, and save the screenshot of the result, then send it to our email: support@geekworm.com, then we will figure out your problem together.
* (3) Please remember to send us your '''order number and the website''' you ordered to us when you contact us for the X820 problem by email: support@geekworm.com.Thank you!
Q: What is a recommended HDD for this board?
* Basically it can support all the 2.5-inch HDD with SATA 2 or STATA 3 interface.
Q: How to do if I don't like the blue light on the power switch?
* It is ok to disable the blue light on the power switch, you just need to pull out the white cable. Please refer to the picture.
<gallery>
Turn-off-led-IMG-20181108-095055.jpg|Caption1
</gallery>
Q: Why can't boot from the SSD or HDD?
* Customer Feedback 1: I have followed the same steps you provided and my ssd is not able to boot. I have tried again with a normal sata hard drive and it works fine. My original ssd (Patriot Burst 240gb) draws too much power. Thus, do not boot.
Q:Can you stack the module with itself? is the usb cable and bridge crossover?
*Theoretically, you can stack the X820 module to use by USB cable.
But you need to solve the problem of how to power them, if you stack them together, it may need more power. Actually we do not test on how to stack them together, hope to get your understanding!
Q: Why the voltage warnings shows on my Pi?
Customer feeback: The board works as advertised with the 4a power supply they recommend but seems to lie really close to the voltage limit. I get a number of voltage warnings while using until I stopped using the KVM switch (which had a separate power supply) and just used a USB keyboard. Outside of that, assembled just fine and was able to configure a SSD 2.5 drive without issue.
* To a large extent, we doubt that voltage warnings maybe caused by the power supply.
* Our power supply has an idling output voltage of 5.2V , even when the working current reaches 4A, the output voltage will be around 4.9V, this is the reason why the Raspberry Pi system does not have undervoltage.
* So we suggest that you can measure the output voltage of your power supply when under load your device. Please test directly the voltage value between GND and 5V PIN.
* We found that many power supplies on the market are known as 5V 4A output, but when use this power adapter at high current output , the voltage often drops very badly, with only about 4.7V or lower than 4.7V.
Q:Is there really a 4tb limit? Will this X820 board not work with 6tb or 8tb?
* Theoretically it can work with 6tb or 8tb as well. But actually we do not test the X820 board with 6tb or 8tb HDD, hope to get your understanding!
Q: What is the pinout for the PWR Switch?
A: Please refer to here: [http://www.raspberrypiwiki.com/index.php/PH2.0_Connectors_for_External_Power_Switch PH2.0 Connectors for External Power Switch]
Q: Where can I buy this product?
* Please visit our [https://geekworm.com/collections/best-sellings/products/raspberry-pi-x820-2-5-inch-sata-storage-board-dc-5v-4a-power-supply-metal-case-kit Geekworm official store]
For more questions, please refer to blog '''[https://geekworm.com/blogs/raspberry-pi/faq-of-raspberry-pi-x820-v3-0-usb-3-0-2-5-sata-hdd-ssd-storage-expansion-board FAQ of Raspberry Pi X820 V3.0 USB 3.0 2.5" SATA HDD/SSD Storage Expansion Board]'''
==Customer Video==
1. https://youtu.be/JsrjKcfi1mg
2.https://youtu.be/IGxRA_JgoRc
==How to boot from a USB Mass storage device on a raspberry pi 3==
This tutorial explains how to boot your Raspberry Pi 3 from a USB mass storage device such as a flash drive or USB hard disk. Be warned that this feature is experimental and does not work with all USB mass storage devices. See this blog post from Gordon Hollingworth for an explanation of why some USB mass storage devices don't work, as well as some background information.
===Program USB Boot Mode===
Before a Raspberry Pi 3 will boot from a mass storage device, it needs to be booted from an SD card with a config option to enable USB boot mode. This will set a bit in the OTP (One Time Programmable) memory in the Raspberry Pi SoC that will enable booting from a USB mass storage device. Once this bit has been set, the SD card is no longer required. Note that any change you make to the OTP is permanent and cannot be undone.
You can use any SD card running Raspbian or Raspbian Lite to program the OTP bit. If you don't have such an SD card then you can install Raspbian or Raspbian Lite in the normal way - see [https://www.raspberrypi.org/documentation/installation/installing-images/README.md installing images].
* First, prepare the ''/boot'' directory with up to date boot files:
sudo apt-get update
sudo apt-get upgrade
The above step is not required if you use the 2017-04-10 release of Raspbian / Raspbian Lite or later, <span style="color:red;">(PS: use or update the last Raspbian version is always recommend)</span>
* Then enable USB boot mode with this code:
echo program_usb_boot_mode=1 | sudo tee -a /boot/config.txt
sudo reboot
This adds ''program_usb_boot_mode=1'' to the end of ''/boot/config.txt''. Reboot the Raspberry Pi with ''sudo reboot'', then check that the OTP has been programmed with:
vcgencmd otp_dump | grep 17:
17:3020000a
Ensure the output 0x3020000a is shown. If it is not, then the OTP bit has not been successfully programmed.
If you wish, you can remove the ''program_usb_boot_mode'' line from config.txt, so that if you put the SD card in another Raspberry Pi, it won't program USB boot mode. Make sure there is no blank line at the end of config.txt. You can edit config.txt using the nano editor using the command ''sudo nano /boot/config.txt'', for example.
===Prepare the operating system image ===
Starting with the 2017-04-10 release of Raspbian you can install a working Raspbian system to a USB mass storage device by copying the operating system image directly onto your USB device, in the same way that you would for an SD card. To perform this step, follow the instructions [https://www.raspberrypi.org/documentation/installation/installing-images/README.md HERE], remembering to select the drive that corresponds to your USB mass storage device.
Once you have finished imaging your USB mass storage device, remove it from your computer and insert it into your Raspberry Pi 3.
'''[Boot your Raspberry Pi 3 from the USB mass storage device]'''
Attach the USB mass storage device to your Raspberry Pi 3 and power it up. After between five and ten seconds the Raspberry Pi 3 should begin booting, and display the rainbow splash screen on an attached screen.
Please refer to here: [https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md USB mass storage device boot]
==Document==
Chinese User Manual: [[File:X820-V3.0Guide-CN.pdf]]
<comments />
[[Category:Product Manual]]
[[Category:Raspberry pi]]