Intel Core i7 CPU (and later): Booting From External Flash

This section explains how to boot the system image a USB stick or SD Card.

Preparation

Important

Ensure you replace <factory> with the name of your Factory.

Download the necessary files from https://app.foundries.io/factories/<factory>/targets:
1. Click the latest Target with the platform trigger.
2. Expand the run in the Runs section which corresponds with the name of the board. Download the Factory image for that machine, e.g., lmp-factory-image-<machine-name>.wic.gz or lmp-base-console-image-<machine-name>.wic.gz.

Flashing

Flash lmp-factory-image-intel-corei7-64.wic.gz to a USB stick/SD Card. This contains the bootable system image.

Determine which disk to flash by finding the device with the SIZE that matches that of your flash drive. Ignore partitions (indicated by part under TYPE). Note the NAME of the flash drive (e.g., /dev/mmcblk0, /dev/sdb), as it will be used for the disk path:

lsblk -po +MODEL

$ lsblk -po +MODEL
NAME             MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT                 MODEL
/dev/mmcblk0     179:0    0  29.8G  0 disk
├─/dev/mmcblk0p1 179:1    0  41.6M  0 part /mnt/boot
└─/dev/mmcblk0p2 179:2    0  29.8G  0 part /mnt/otaroot
/dev/zram0       254:0    0    26G  0 disk /out
/dev/nvme0n1     259:0    0 953.9G  0 disk                            SSDPEKKF010T8 NVMe INTEL 1024GB

Flash the disk.

Replace <system-image> with the path to your system image.

Replace /dev/mmcblk<X> with your chosen disk path.

gunzip -c <system-image> | sudo dd of=/dev/mmcblk<X> bs=4M iflag=fullblock oflag=direct status=progress

Determine which disk you want to flash by finding the device with the SIZE that matches that of your flash drive. Ignore partitions (lines without * in the SIZE). Note the IDENTIFIER of the flash drive, (e.g., /dev/disk3) as it will be used for the disk path:

``diskutil list``:

$ diskutil list
/dev/disk3 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:     FDisk_partition_scheme                        *15.5 GB    disk3
   1:             Windows_FAT_32 boot                    45.7 MB    disk3s1
   2:                      Linux                         15.5 GB    disk3s2

Flash the disk.

Replace <system-image> with the path to your system image.

Replace /dev/disk<X> with your chosen disk path.

gunzip -c <system-image> | sudo dd of=/dev/disk<X> bs=4M

Windows has no built in tools for flashing the image to disk. We recommend you download and use either Win32 Disk Imager or Rufus.

Note

Your system image is in a compressed wic.gz format. To follow these next steps, you must extract it using a tool like 7zip which will leave you with a .wic image file.

Using Rufus:

Download and run Rufus.
Select your disk.
SELECT your <system-image>.
START the flash procedure.

Using Win32 Disk Imager

Download and run Win32 Disk Imager as Administrator.
Click the blue folder icon.
Select your <system-image>
Select your disk via the Device dropdown.
Click Write
Wait for the image to finish writing. A Write Successful dialog will appear.

Remove the flash drive and connect it to the board.
Power on the board to boot the new image.

Most Intel devices will boot from USB automatically. If the device does not, hold F12 when the device boots. This will allow you to select the USB from a system-specific boot menu.

If F12 does not work for you, check your device’s documentation for how to bring up the boot menu.