http://72.14.235.104/search?q=cache:sbmzrXtuBI4J:www.ibm.com/developerworks/library/l-linuxboot/index.html+linux+mbr+check&hl=en&ct=clnk&cd=1&gl=my&client=firefox-a

http://www.ibm.com/developerworks/library/l-linuxboot/index.html