How TO Merge Two Drives

First read carefully before doing any thing else i am not responsible for any thing.

control panel->Administrative Tools->Computer Management->storage->disk management->hard disk->write click->convert to dynamic disk->
After converting both hard disk as dynamic hard disk ->now extend partition and add the amount of the hard disk space from second hard disk to you first hard disk drive.you can do the same for extending any partition in same hard disk also but you should have that much empty space in your hard disk Precaution :-->
first take data back up of your entire hard disk because if you are not able to do that you may loss your data and after converting your hard disk from basic to dynamical you can not revert it back.

Limitation:
1) you should have at least windows 2000 or above OS in your computer.
2)Your hard disk partition must be of NTFS.
3) There is no way to come back from dynamical to basic hard disk.

Warning :
1) I am not going to take any responsibility for this if any thing goes wrong.
2) Take your data back up in some DVD. or in any other hard disk.