Device reference: WDBCTL0030HWT-EESN

Board reference: WD_Glacier_DB-88F6720-V2

• Marvell SoC Armada 375 (88F6720)
• Macronix flash memory: MX25L8006E
• Samsung DDR3 SDRAM: 1x 512 MB K4B4G1646D-BCK0
• Western Digital hard drive: WD30EFRX.

I am not responsible for any damage or waranty loss. This is not supported by Western Digital.

Instructions lead to data loss. Consider backing up data. Think twice before running scripts.

1. Trial and error show that the bootloader looks for two files on partition 3 (and then partition 5 if the first startup fails):

• uImage (kernel and dtb files),
• uRamdisk (compressed ramdisk).

2. /linuxrc (initrd) is executed, /bin/busybox takes over, reads /etc/inittab and executes /etc/rc.sh,
3. special filesystems are mounted and scripts/system_init from image.cfs is run.

For more, see partitions.

• mkimage from U-Boot (uboot-tools)
• arm-none-eabi-gcc from ARM (gcc-arm-none-eabi-bin)

1. Create an ext2 partition with number 3 (U-Boot looks in 3 and then 5)

Number  Start (sector)    End (sector)   Size      Code  Name
   3            2048          264191   128.0 MiB   8300  Linux filesystem

mke2fs -t ext2 -m 0 <device>

2. Generate uImage and uRamdisk (optionally edit the kernel configuration in config and the init script for initramfs)

make

3. Copy the files to the folder /boot

mount /dev/sdb3 /mnt
cp uImage /mnt/boot/
cp uRamdisk /mnt/boot/
umount /mnt

4. Boot the device

Instructions in root/README.md.

• SATA to USB adapter (partition and write to the hard drive)
• UART to USB adapter and soldering material for a U-Boot prompt

• lock the root account
• configure the partition to save data
• set up rsync

• the hard drive does not automatically go to standby mode

• Fox's website
• Doozan forum
• John-Q's wdmc-gen2 repository @GitHub (and its forks)