here i wanna show you how to convert a HDD from dynamic to logical and also to any format in cmd prompt. Hope it will be helpfull to you.

2. *OPTION ONE:
*Using Disk Management:
* 1. Open the Control Panel (All Items view), and click on the Administrative Tools icon. then close the Control Panel window.
* 2. Click on Computer Management in Administrative Tools, then close the Administrative Tools window.
* 3. In the left pane under Storage, click on Disk Management. (See screenshot below)

4. 4. In the middle pane, right click on the partition that you want to delete and click on Delete Volume. (See screenshot above)
NOTE: If the partition is a logical partition, then you will need to delete the free space again to have it as unallocated space.
5. Click on Yes to confirm deletion. (See screenshot below)

5. *6. The selected partition (step 4) is now deleted and is now unallocated space on the disk. If not, then delete the partition again until it displays as unallocated space like below.
*NOTE: You can use this unallocated space to create a new partition with, or extend another partition on that same hard disk into it.

7. Command Prompt

8. *1. Open a elevated command prompt, or a command prompt at boot. 2. In the elevated command prompt, type diskpart and press Enter. (See screenshot below)

9. *3. In the elevated command prompt, type list volume and press Enter. (See screenshot below) NOTE: This will give you a list of volume numbers to select from to delete.

10. *4. In the elevated command prompt, type select volume # and press Enter. (See screenshot below)
*NOTE: You would substitute # for the volume number listed that you want to delete. For example, I want to delete the listed volume 3, so I would type select volume 3 and press Enter.

11. *5. In the elevated command prompt, type delete volume and press Enter. (See screenshot below)
*NOTE: If it fails to delete, then use type delete volume override and press enter instead.

12. *6. In the elevated command prompt, type exit and press Enter. (See screenshot below)

13. *7. Close the elevated command prompt.
*8. The selected partition (step 4) is now deleted and is now unallocated space on the disk.
*NOTE: You can use this unallocated space to create a new partition with, or extend another partition on that same hard disk into it.
*http://www.sevenforums.com/tutorials/2668-partition-volume-delete.html
*http://www.911cd.net/forums//index.php?showtopic=12698
*http://www.google.co.in/#sclient=psy- ab&hl=en&source=hp&q=delete+volume+in+cmd+&pbx=1&oq=delete+volume+in+cmd+&aq=f&aqi=&aql=&gs_sm=e&gs_upl=2063l2430l7l2770l3l2l1l0l0l0l0l0ll1l0&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=52bed552ddca6120&biw=1150&bih=665