Nate's MBR and Boot Sector Analyzer

Paste the first sector of your hard drive as hex values, using any ASCII character as a delimiter between values, and press Submit. Or choose a data set from the drop-down list below. This Boot Sector Calculator will detect boot sectors from IBM DOS 1.0 all the way to Microsoft Windows 7, MacOS, Linux GRUB, and other boot sectors.

Send a file containing raw data:
Or paste contents here:

Then select from the following list
References and Special Thanks:
udis86 x86 Disassembler (
DOS 2.0 MBR (
EFI Analysis (
GRUB Analysis (