The file 7, $Boot, starts at cluster 0 of the volume. The first 0x28 bytes are the same as for FAT boot sectors, except that useless fields are zeroed. The last sector is stored in its own run, which is located in the logical center of the volume - for crash recovery.
offset(length) contents 0(3) Jump to boot routine 3(4) System ID 'NTFS ' B(2) Sector size of volume D(1) Number of sectors per cluster E(7) unused, zero filled 15(1) Media descriptor (f8: hard disk) 16(2) unused, zero filled 18(2) Sectors per track 1A(2) Number of heads 1C(8) unused, zero filled 24(2) ?unknown, set to 80 26(2) ?unknown, set to 80 28(8) Number of clusters in volume 30(8) Cluster number of the master file table ($MFT) 38(8) Cluster number of copy of the master file table ($MFTMirr) 40(4) MFT record size in clusters 44(4) Index buffer size in clusters 48(4) Volume serial number 4C(4) ? 50(D) unused, zero filled 5D(1A1) Boot routine 1FE(2) Magic boot sector ID (AA55) 200 more code, probably NT kernel loader last 200 bytes copy of first 0x200 bytes