Virtualbox on OS6 NAS

# Upgrading VirtualBox (4.3.20-96996) on ReadyNAS OS6 after upgrading to (6.2.0)
# After upgrading to 6.2.0 this included a newer kernel which resulted in VirtualBox not working

# I tried this a few times before I got it working so I am only going to post up what I did the last time rather than including everything I did as some steps may not be needed.

# NOTE: I am assuming you followed the steps in my post above. Modify these notes to meet your configuration.

    ## Cleaning up VirtualBox installation files and directory
    # SSH into your NAS
    # ** Removing the symbolic link to the old kernel files for OS 6.1.8
    cd /usr/src/
    rm linux-3.0.101-0.15
    # ** Removing the linux-3.0.101-0.15 directory for OS 6.1.8
    rm -rf /data/.apps/linux-3.0.101-0.15

    cd /data/VirtualBox
    rm ReadyNASOS_V6.1.8_WW_src.zip
    rm Oracle_VM_VirtualBox_Extension_Pack-4.3.12-93733.vbox-extpack
    rm VBoxGuestAdditions_4.3.12.iso
    rm virtualbox-4.3_4.3.12-93733~Debian~wheezy_amd64.deb
    rm -rf tmp

    ## Download VirtualBox files to /data/VirtualBox
    # http://download.virtualbox.org/virtualbox/4.3.20/
    # **This is what I used
    # virtualbox-4.3_4.3.20-96996~Debian~wheezy_amd64.deb
    # Oracle_VM_VirtualBox_Extension_Pack-4.3.20-96996.vbox-extpack
    # VBoxGuestAdditions_4.3.20.iso

    ## Download Kernel files to /data/VirtualBox
    # *** MAKE SURE ITS FOR THE CORRECT KERNEL (uname -a)
    # http://kb.netgear.com/app/answers/detail/a_id/2649/~/gpl-open-source-code-for-programmers
    # **This is what I used
    # ReadyNASOS_V6.2.0_WW_src.zip

    ## Extract and copy kernel files
    mkdir tmp
    mv ReadyNASOS_V6.2.0_WW_src.zip tmp
    cd tmp
    unzip ReadyNASOS_V6.2.0_WW_src.zip
    cp -rp linux-3.0.101-0.40 /data/.apps
    ln -s /data/.apps/linux-3.0.101-0.40 /usr/src/linux-3.0.101-0.40

    ## Installation kernel files (NOTE: I did this step a few times before I got it working so let me know if this doesn't work)
    apt-get update
    apt-get install build-essential
    apt-get install vim git lm-sensors telnet
    export KERN_DIR=/usr/src/linux-3.0.101-0.40
    cd /usr/src/linux-3.0.101-0.40
    cp /data/VirtualBox/tmp/linux-3.0.101-0.40/arch/x86/configs/defconfig.x86_64 /usr/src/linux-3.0.101-0.40/.config
    # ** Check kernel install options and modules
    make menuconfig
    make ARCH=x86_64
    make modules_install ARCH=x86_64
    apt-get install libqt4-opengl libvpx1

   ## Installation of VirtualBox
    cd /data/VirtualBox/
    dpkg -i virtualbox-4.3_4.3.20-96996~Debian~wheezy_amd64.deb
    apt-get -f install
    /etc/init.d/vboxdrv setup
    modprobe vboxdrv
    modinfo misc/vboxdrv.ko

    ## Upgrade VirtualBox Extension Pack
    VBoxManage extpack uninstall "Oracle VM VirtualBox Extension Pack"
    VBoxManage extpack install Oracle_VM_VirtualBox_Extension_Pack-4.3.20-96996.vbox-extpack