How to Hide and Show DVD drive in window 7

How to hide a partition in Windows?

-Right-Click on My Computer [Computer in Windows Vista and Windows 7]
-Click on Manage.
-From the list of options Click on Disk Management that will be located in the left-bottom section.
-All your hard disk and its partitions will be show in the right hand side.
-Right-Click on the partition that you want to hide and select .

-"Change Drive Letters and Path"
-Click on "Remove" and click "Yes"
-Your drive will now be hidden in my computer.

To unhide the drive :

-Go to Disk Management Right-Click on the hidden partition [there will not be a drive letter on the hidden                 drive] again select
-"Change Drive Letters and Path"
-Click on add and select an appropriate drive letter.
-Click Ok
-Now the drive is unhided.