From: Ron on
Terabyte, the people who bring you some fine commercial imaging
programs, have a lot of small freewares on their site.

"MBRWork is a utility to perform some common and uncommon tasks to the
MBR/EMBR sectors of a hard drive. It should only be used by power users
who understand how computers work. The readme.txt file in the ZIP
contains a list of the tasks available."

MBRWork works to repair the associated sectors at the beginning of a
drive. it's one of many free tools available from Terabyte. Good find
for the toolkit, imho. Take a look at the other tools; might be
something you like.

http://www.terabyteunlimited.com/downloads-free-software.htm

More discussion on how to use it here
http://www.pcguide.com/vb/showthread.php?t=60842

I bought my first cloning software from Terabyte years ago. They produce
safe, reliable (if a little on the ubergeeky side) software. As always,
ymmv.

Ron Moore