I'd like to run Linux(Ubuntu) which is installed on hard disk (Ext4) inside Windows7. Use two OSes, installed on hard disk simultaneously.
I've found how to do this in other way around (VirtualBox) - Linux as Host, Windows7 on physical partition as Guest. I haven't tested it yet, but I've read it's possible.
I've found something in VMWare Player - Add physical partition/disk, but it seems this solution can't boot VM from those partitions, just mount them to existing VM.
I'd like to have a way to run Windows7 and Ubuntu natively or Ubuntu as Host & Win7as Guest or Win7 as Host & Ubuntu as Guest.
I have to switch between OSes multiple times and it will really saves my time.

commentssection, care to share how you got an existing Win7 install to run under Ubuntuvirtualbox? superuser.com/q/839827