:MBR:Master Boot Record

*magic number 0xAA55

 ns# dd if=/dev/ad0s1a bs=512 count=1 | hexdump -C | tail
 1+0 records in
 1+0 records out
 512 bytes transferred in 0.013797 secs (37109 bytes/sec)
 00000170  05 00 c4 5e 04 50 b4 02  cd 13 5b 73 0a 4f 74 1c  |...^.P....[s.Ot.|
 00000180  30 e4 cd 13 93 eb eb 0f  b6 c3 01 46 08 73 03 ff  |0..........F.s..|
 00000190  46 0a d0 e3 00 5e 05 28  46 02 77 88 c3 52 65 61  |F....^.(F.w..Rea|
 000001a0  64 00 42 6f 6f 74 00 20  65 72 72 6f 72 0d 0a 00  |d.Boot. error...|
 000001b0  80 90 90 90 90 90 90 90  90 90 90 90 90 90 00 00  |................|
 000001c0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
 *
 000001e0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 80 00  |................|
 000001f0  01 00 a5 fe ff ff 00 00  00 00 50 c3 00 00 55 aa  |..........P...U.|