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Offset/Purpose:
0-2 three bytes of Jump instruction (Assembly code) to jump to boot code (mandatory in bootable partition.)
3-10 OEM name in ASCII (OEM ID)
11-12 Bytes per sector (BPB)
13 Sectors per cluster
14-15 Reserved (Microsoft says to set this to 0)
16-20 Unused (Microsoft says to set this to 0)
21 Media descriptor
22-23 Unused (Microsoft says to set this to 0)
24-31 Unused (Microsoft says that this is not checked)
32-35 Unused (Microsoft says to set this to 0)
36-39 Unused (Microsoft says that this is not checked)
40-47 Total sectors in file system
48-55 Starting cluster address of $MFT
56-63 Starting cluster address of $MFT Mirror $DATA attribute
64 Size of MFT entry
65-67 Unused
68 Size of index record (directory entry)
69-71 Unused
72-79 Serial number
80-83 Unused
84-509 Bootstrap code
510-511 End of Sector Marker Signature (0xAA55 magic number)
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