Content Comparison

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However it is more likely that neither Linux nor even U-Boot are available at this point. Refer to section i.MX6 U-Boot  how to load u-boot to RAM.

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• resize the rootfs partition

• resize the rootfs filesystem

• create and format the 2nd and 3rd partitions

• extract the archives from /boot into the relevant partitions

• delete the archives from /boot

• disable itself from systemd

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• calculate the smallest image size that will contain your data

  • run

  “du

  • du -s -B M /path/to/your/

  rootfs”

  • rootfs to get the size of your data in megabytes

  • add 10%

  • partition size is at least 1MB smaller than the drive.

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• • create an image file with a single ext4 partition: and with the bootloader

  • dd if=/dev/zero of=/path/to/vivi.img bs=1M count=$SIZE_MB

  • losetup /dev/loop0 /path/to/vivi.img

  • dd if=path/to/u-boot-imx6/SPL of=/dev/loop0 bs=1k seek=1 oflag=sync

  • dd if=path/to/u-boot-imx6/u-boot.img of=/dev/loop0 bs=1k seek=42 oflag=sync

  • Code Block
    sfdisk -f -uB /dev/loop0 «EOF

  • 1024,${PARTSIZE}

  • EOF

  • sync

  • losetup -d /dev/loop0

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• populate the single partition with the rootfs, the archives of the other partitions, and the firstboot script

  • losetup -o 1048576 /dev/loop0 /path/to/vivi.img # load the partition and not the entire disk image

  • mkfs -t ext4 /dev/loop0

  • mount /dev/loop0 /mnt

  • do populate

  • add the firstboot script: systemd firstboot script - Google Search

  • umount /dev/loop0

  • losetup -d /dev/loop0

Further reading

• Booting from network/PXE