I have already installed win 7 in my primary partition (30GB). Now I want to make logical partitions in the rest of the disk space (566GB) but I don't want to use partition wizard. Advice will be helpful.
Using Disk Manager is the easiest way.
However you can do it from a command prompt with the DISKPART utility.
The last two commands create an extended partition in which you will put the logicals, and the logical partition itself. Choose the sizes you need.