Missing Hard Drive

My operating system does not recognize the second hard
drive. The drive was working ok, but now when I start up
it is not showing up in Explorer or My Computer. I am
having problems with C drive but don't know if that is
related to the second drive problem. The C drive gives a
message on startup that there may be errrors and Scandisk
needs to be run. When I press any key, Microsoft Scandisk
comes up but that is all. No graph of progress or anything.
I can press Control-Alt-Delete and when it re-boots it may
or may not bring up the message about running Scandisk. If
it does it scans and continues to boot up, otherwise it
boots up ok this time. I have asked for help with this
problem before and one person asked if the Bios recognizes
the other drive. I haven't had any luck getting to the
Bios. What do I need to do to get to the Bios and could the
problem with the C drive be causing the second drive to not
be showing up?