The article describes the way to boot RaspberryPi 2 from USB HDD. SD card is used only for boot loader, the whole OS is on HDD which makes raspberry much more reliable.
Prepare card with fresh Raspbian image
Boot raspberry from newly created card
Connect USB drive
Check that USB drive is visible:
blkidCopy rasbbian image to the booted system
Copy the second partition from image (linux ext4) to hdd, /dev/sda1 for instance. Use dd with offset:
fdisk -l image.img
dd if=image.img of=/dev/sda1 skip=start_value_for_second_partition_in_previous_fdisk_commandCheck newly created fs:
e2fsck -f /dev/sda1Resize newly created fs:
resize2fs /dev/sda1Mount /dev/sda1:
mount /dev/sda1 /mntChange fstab on new FS:
vi /mnt/etc/fstabremove /boot
change PARTUUID for rootfs (take from blkid command output)
Change root partition in SD card bootloader:
cd /boot
vi ./cmdline.txtchange root=PARTUUID=your_partuuid
Example:
dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=PARTUUID=5218d05d-01 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwaitReboot