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Raspberry pi hard disk manager5/15/2023 So, what am I missing? I'd love to be able to pop the microSD out, but even if I can't, at least there's no longer any wear-and-tear on it. Open Win32DiskImager, you may need to run as an. (btw, the /boot/cmdline.txt PARTUUID value points to /dev/sda2 as it should). Installing the OS Insert the SD card into your SD card reader and check which drive letter is assigned. ![]() The fact that the USB boot bit is set made no difference. ![]() If I remove the microSD, and power-up the Pi, it just doesn't boot. The microSD's /boot partition cmdline.txt tells my pi-3+ to actually boot to "/" and "/boot" in /dev/sda USB drive. Right now I need a stepping-stone to boot to the USB disk. Also, if you need just an overview of your file system you may use. img file for the microSD on to the hard drive. -s prevents a lot of unnecessary output, -nr sorts numerically in reverse order and head cuts only the interesting part, you may omit it if you prefer all the results. Further, in the sda2 partition /etc/fstab the PARTUUID valuess of the sda1 and sda2 partitions had to replace the values embedded in the /etc/fstab by dd-ing the. img onto has the same PARTUUID, so it just works flawlessly for booting from microSD, right?) For me, in order to boot to my sda2 partition I had to use # blkid to read the PARTUUID of the disk's sda2 partition and write that value into the PARTUUID value of the microSD's /boot/cmdline.txt file. Wait? What? In the distributed microSD image, file /boot/cmdline.txt points to the PARTUUID of the "/" partition on the target microSD card. You can edit config.txt using the nano editor using the command:- sudo nano /boot/config.txt # then scroll all the way to the bottom Make sure there is no blank line at the end of config.txt. 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. If the bit is still not set, this may indicate a fault in the Pi hardware itself. In this case, go through the programming procedure again. If it is not, then the OTP bit has not been successfully programmed. Then check that the OTP has been programmed with:- vcgencmd otp_dump | grep 17:Ĭheck that the output 17:3020000a is shown. ![]() Reboot the Raspberry Pi with:- sudo reboot This adds program_usb_boot_mode=1 to the end of /boot/config.txt. Then enable USB boot mode with this code:- echo program_usb_boot_mode=1 | sudo tee -a /boot/config.txt First, prepare the /boot directory with up to date boot files:- sudo apt update & sudo apt upgrade & sudo reboot Using a hard disk drive with your Raspberry Pi doesnt have to mean using the disk as a secondary device. You can use any SD card running Raspbian or Raspbian Lite to program the OTP bit. Note that any change you make to the OTP is permanent and cannot be undone. Once this bit has been set, the SD card is no longer required. To enable the USB boot bit, the Raspberry Pi 3 needs to be booted from an SD card with a config option to enable USB boot mode. The Raspberry Pi 3 B+ is able to boot from USB without any changes, but the Raspberry Pi 3 requires the USB boot bit to be set in the OTP (one-time programmmble).
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