XEN Guest Swap partition problem

[sklpr]

Hello all,

I am trying to configure a domU guest for Xen Hypervisor [HVM - mode - > fully virtualized] , so I follow every instruction on this guide!

Xen Hypervisor is directly installed on hardware drive /dev/sdd4 with right partitions (with LVM partition for guests) as mentioned on official Ubuntu website

But I am a bit confused about the mkswap command in order to "Configure the Swap Partition for the Xen Guest System"

// sda is a hard-drive with Ubuntu - desktop installed (my primary OS)
// and sdd is another hard-drive has XEN dom0 (installed on Ubuntu Server 12.04.5) and LVM for guests

-- fdisk - l output for sda and sdd:

http://i58.tinypic.com/30wwl5e.jpg

http://i57.tinypic.com/5y7qtf.jpg

-- cat /etc/fstab output :

http://i60.tinypic.com/2yp0jye.jpg

-- swapon -s output :

http://i58.tinypic.com/zksx2c.jpg

The error I get when i am trying to : mkswap /dev/sdd2 is : Device or resource busy

So if I try to unmount /dev/sdd2 will it fix it or i will mess up the system and I will have to format and re-install it again ? ? :-/

Please ask me if you need further information about my system or problem..

Thanks in advance !