I am running the latest version of DSM 6.0 on VirtualBox, my VirtualBox is installed on ASUSTOR NAS AS5102T,
- Download ISO and PAT files posted in the beginning of this post
- Install VirtualBox on any platform (ie. Windows, Linux, NAS or PC)
- Create a VM using Linux 2.6 3x 64bit
- Sata controller with CD drive (Primary) Hard drive (Secondary)
- Choose hard drive type VDI with EXT4 format (VMDK won't work)
- Mount ISO image you've downloaded earlier
- Always boot your VM in INSTALL mode, RUN won't work
- Then follow rest of the instructions mentioned earlier in this port