Do hard drives or other drives need to be chassis ground?

[94blue302gt]

The reason I ask is because I am using plexiglass extensively in my case, and was going to build the mounting system for them out of plexi as well. The mobo and the PSU are chassis ground, but didn't know if the drives were necessary.

 

[94blue302gt]

wonderfull.... back to my slicing and dicing...