Guys
I got a quick reply a while ago regarding sysprep thanks, thats something new.
I have C partition only on my master server and i wanted to add another partition prior to clone.
I just add new Hard disk 50 GB and choose option Create new virtual disk > Store in Data Store > finish
I browse my VC to ensure that 50 gb disk has been created and i can see <servername> flat.vmdk and <servername>1-flat.vmdk which is 50 gb.
Now i tried to power on and it says , unable to acess the file, it is locked,
I removed the new added HD , its Ok power on,
i tried to add again and this time i point to use existing virtual disk and browse to same previously created 50 gb file.
same error 
pls help