Comp dose not see master and secondary hard drive how do I fix will not let me boot up

Is this recent?

If possible please supply as much information as to describes your problem or question if it applies to request. Most are easy and if not supplied, they may be asked eventually depending on situation.

What operating system you're running, and its version.
What is the exact text of the error message if possible, this may convey a lot of information.

Any changes that either happened or that you perhaps made to your computer around the time that the problem started; particularly any Software or Hardware that you installed or setup.