What is write protect and how do I disable it ?

It depends on the media that is write protected.

Wait, you are talking about hard drives...
For some reason I think there might be a setting in the bios. But I'm not for sure. You may try pecking around in there and seeing what you find.

There may be a jumper on the drive itself.

Need more info on exactly what you would be referring to

-just a definition or how to use it or disable/enable and on what