MBR inside

将MBR显示出来：
dd if=/dev/sda of=mbr.bin bs=512 count=1
od -A d -x1 mbr.bin

[root@localhost fd_linux]# od -A d -t x1 mbr.bin
0000000 eb 48 90 10 8e d0 bc 00 b0 b8 00 00 8e d8 8e c0
0000016 fb be 00 7c bf 00 06 b9 00 02 f3 a4 ea 21 06 00
0000032 00 be be 07 38 04 75 0b 83 c6 10 81 fe fe 07 75
0000048 f3 eb 16 b4 02 b0 01 bb 00 7c b2 80 8a 74 03 02
0000064 80 00 00 80 3f 46 7e 02 00 08 fa 80 ca 80 ea 53
0000080 7c 00 00 31 c0 8e d8 8e d0 bc 00 20 fb a0 40 7c
0000096 3c ff 74 02 88 c2 52 be 79 7d e8 34 01 f6 c2 80
0000112 74 54 b4 41 bb aa 55 cd 13 5a 52 72 49 81 fb 55
0000128 aa 75 43 a0 41 7c 84 c0 75 05 83 e1 01 74 37 66
0000144 8b 4c 10 be 05 7c c6 44 ff 01 66 8b 1e 44 7c c7
0000160 04 10 00 c7 44 02 01 00 66 89 5c 08 c7 44 06 00
0000176 70 66 31 c0 89 44 04 66 89 44 0c b4 42 cd 13 72
0000192 05 bb 00 70 eb 7d b4 08 cd 13 73 0a f6 c2 80 0f
0000208 84 f0 00 e9 8d 00 be 05 7c c6 44 ff 00 66 31 c0
0000224 88 f0 40 66 89 44 04 31 d2 88 ca c1 e2 02 88 e8
0000240 88 f4 40 89 44 08 31 c0 88 d0 c0 e8 02 66 89 04
0000256 66 a1 44 7c 66 31 d2 66 f7 34 88 54 0a 66 31 d2
0000272 66 f7 74 04 88 54 0b 89 44 0c 3b 44 08 7d 3c 8a
0000288 54 0d c0 e2 06 8a 4c 0a fe c1 08 d1 8a 6c 0c 5a
0000304 8a 74 0b bb 00 70 8e c3 31 db b8 01 02 cd 13 72
0000320 2a 8c c3 8e 06 48 7c 60 1e b9 00 01 8e db 31 f6
0000336 31 ff fc f3 a5 1f 61 ff 26 42 7c be 7f 7d e8 40
0000352 00 eb 0e be 84 7d e8 38 00 eb 06 be 8e 7d e8 30
0000368 00 be 93 7d e8 2a 00 eb fe 47 52 55 42 20 00 47
0000384 65 6f 6d 00 48 61 72 64 20 44 69 73 6b 00 52 65
0000400 61 64 00 20 45 72 72 6f 72 00 bb 01 00 b4 0e cd
0000416 10 ac 3c 00 75 f4 c3 00 00 00 00 00 00 00 00 00
0000432 00 00 00 00 00 00 00 00 af 83 04 00 00 00 80 01
0000448 01 00 83 fe ff ff 3f 00 00 00 0f ce df 03 00 fe
0000464 ff ff 82 fe ff ff 4e ce df 03 c3 1c 20 00 00 00
0000480 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0000496 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa
0000512

 

这是MBR partition表中的第一项：

                                                                        80 01
0000448 01 00 83 fe ff ff 3f 00 00 00 0f ce df 03
1. Boot Indicator 80 引导扇区
2. Starting Sector  in CHS values 01 01 00 (head, sector, cylinder)=(1, 0, 1)
3. Partition Type 83 Linux native file systems (ext2/3/4, JFS, Reiser, xiafs, and others).
4. Ending Sector  in CHS values (3 bytes) fe ff ff (head, sector, cylinder)=(254, 63, 1023)
5. Starting Sector (4 bytes) 3f 00 00 00 --> 00 00 00 3f --> 63
6. Partition Size in Total sectors (4 bytes). 0f ce df 03 --> 03 df ce 0f --> 64998927(sector)
4046 * 255 * 63 = 64998990
http://thestarman.pcministry.com/asm/mbr/PartTables.htm