# All comands from root!
# /deb/sdb - NAS HDD!

# Prepare...
apt-get install build-essential uboot-mkimage libncurses-dev qemu-user-static debootstrap

mkdir /build
cd /build
# Download and extract cross-compile to /build/cross-tools
# Download and extract wd-source-code-gpl to /build/
cd packages/kernel_3.2/
make TOOLCHAIN_DIR=/build/cross-tools/arm-linux-gnueabihf CROSS_COMPILE=arm-linux-gnueabihf- config
make TOOLCHAIN_DIR=/build/cross-tools/arm-linux-gnueabihf CROSS_COMPILE=arm-linux-gnueabihf- menuconfig
make TOOLCHAIN_DIR=/build/cross-tools/arm-linux-gnueabihf CROSS_COMPILE=arm-linux-gnueabihf- all

# Repleace kernel on HDD:
dd if=_bin/uImage of=/dev/sdb5

# Generate clean rootfs:
mkdir /debian
cd /debian
debootstrap --arch=armhf --foreign wheezy .

# Need for chroot (if host arch = x32/x64)
cp /usr/bin/qemu-arm-static usr/bin/

LC_ALL=C LANGUAGE=C LANG=C chroot . /debootstrap/debootstrap --second-stage

# Copy kernel modules
cp /build/kernel_3.2/_bin/lib/* lib/ -R

# Mount necessary fs
mount -t proc proc proc/
mount -t sysfs sys sys/
mount -o bind /dev dev/

# Login to chroot and continue configuration: (Dot at end needed!)
LC_ALL=C LANGUAGE=C LANG=C chroot .

# Set root password for new system!
passwd

# Set hostname
nano /etc/hostname

# Add nameservers for first use
nano /etc/resolv.conf
# ADD:
nameserver 8.8.8.8
nameserver 8.8.4.4

nano /etc/apt/sources.list
# Add or replace:
deb http://ftp.ru.debian.org/debian wheezy main
deb-src http://ftp.ru.debian.org/debian wheezy main

deb http://security.debian.org/ wheezy/updates main
deb-src http://security.debian.org/ wheezy/updates main

# Configure network:
nano etc/network/interfaces
# Add:
auto eth0
allow-hotplug eth0
iface eth0 inet dhcp

# Edit inittab:
nano /etc/inittab
# Add to end:
T0:2345:respawn:/sbin/getty -L ttyS0 115200 vt100

# Remove or replace:
#1:2345:respawn:/sbin/getty 38400 tty1
#2:23:respawn:/sbin/getty 38400 tty2
#3:23:respawn:/sbin/getty 38400 tty3
#4:23:respawn:/sbin/getty 38400 tty4
#5:23:respawn:/sbin/getty 38400 tty5
#6:23:respawn:/sbin/getty 38400 tty6

# Upgrade system packages
apt-get update
apt-get upgrade
apt-get install openssh-server dialog locales dpkg-dev

# Select en_US.UTF-8 and ru_RU.UTF-8 (Or other, if you need it). Then chose default locale.
dpkg-reconfigure locales

# Add missing data for PFE (Network module)
nano /lib/modules/3.2.26/modules.symbols
# Add:
alias symbol:comcerto_fpp_send_command pfe
alias symbol:comcerto_fpp_register_event_cb pfe

nano /lib/modules/3.2.26/modules.dep
# Add:
kernel/pfe.ko:

nano /etc/modules
# Add:
pfe lro_mode=1 tx_qos=1 alloc_on_init=1 disable_wifi_offload=1

# Run depmod for check if all correct:
depmod

# Configure fstab:
nano /etc/fstab
# Replace:

# Default mounts for WDMyCloud
/dev/root       /       ext3    defaults        0       1
/dev/sda3       none    swap    sw              0       0
proc            /proc   proc    defaults        0       0
sysfs           /sys    sysfs   defaults        0       0
tmpfs           /tmp    tmpfs   rw,size=64M     0       0

# CryptoFS From WD. Not present in kernel.
#cgroup /sys/fs/cgroup  cgroup  memory,cpu      0       0

# Data ("Shares" in original firmware)
/dev/sda4       /data   ext4    defaults        0       0

exit

mdadm -A -D /dev/md0 /dev/sdb1 /dev/sdb2
mkdir /mnt/md
mount /dev/md0 /mnt/md
cp /debian/* /mnt/md/ -R
umount /mnt/md

# Thats all!



Tuning:
echo 1 > /sys/block/sda/bdi/cpu0_bind
echo 4096 > /sys/block/sda/bdi/read_ahead_kb
echo cfq > /sys/block/sda/queue/scheduler