The 2Bh segment at offset CD000h appears to contain SMART data, among other things. There are 10 blocks with a "027JJ0DTX" signature (some kind of generic part number) which are immediately followed by a block of SMART attributes. These appear to be updated at hourly intervals.
Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B
ID Flg Cu Wo Raw
-- -- -- -- --------------------
00000000 01 0F 00 53 40 74 89 DB 0B 00 00 00
0000000C 03 03 00 64 64 00 00 00 00 00 00 00
00000018 04 32 00 5F 5F 93 15 00 00 00 00 00
00000024 05 33 00 64 64 00 00 00 00 00 00 00
00000030 07 0F 00 49 3C 42 ED 3F 01 00 00 00
0000003C 09 32 00 62 62 1D 09 00 00 CB CF 0C
00000048 0A 13 00 64 64 00 00 00 00 00 00 00
00000054 0C 32 00 64 64 45 00 00 00 00 00 00
00000060 B8 32 00 64 64 00 00 00 00 00 00 00
0000006C BB 32 00 64 64 00 00 00 00 00 00 00
00000078 BC 32 00 64 64 00 00 00 00 00 00 00
00000084 BD 3A 00 64 64 00 00 00 00 00 00 00
00000090 BE 22 00 51 33 13 00 11 1B 00 00 00
0000009C BF 32 00 64 64 06 00 00 00 00 00 00
000000A8 C0 32 00 64 64 02 00 00 00 00 00 01
000000B4 C1 32 00 50 50 8E A1 00 00 00 00 00
000000C0 C2 22 00 13 31 13 00 00 00 0D 00 00
000000CC C5 12 00 64 64 00 00 00 00 00 00 00
000000D8 C6 10 00 64 64 00 00 00 00 00 00 00
000000E4 C7 3E 00 C8 C8 00 00 00 00 00 00 00
000000F0 F0 00 00 64 FD FE 00 00 00 92 D2 15
000000FC F1 00 00 64 FD 7C B2 16 57 01 00 00
00000108 F2 00 00 64 FD 9F E3 E1 FA 00 00 00
00000114 FE 32 00 64 64 00 00 00 00 00 00 00
Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B
00000000 01 0F 00 53 40 74 89 DB 0B 00 00 00
0000000C 03 03 00 64 64 00 00 00 00 00 00 00
00000018 04 32 00 5F 5F 95 15 00 00 00 00 00
00000024 05 33 00 64 64 00 00 00 00 00 00 00
00000030 07 0F 00 49 3C 42 ED 3F 01 00 00 00
0000003C 09 32 00 62 62 1E 09 00 00 C0 D9 0C
00000048 0A 13 00 64 64 00 00 00 00 00 00 00
00000054 0C 32 00 64 64 45 00 00 00 00 00 00
00000060 B8 32 00 64 64 00 00 00 00 00 00 00
0000006C BB 32 00 64 64 00 00 00 00 00 00 00
00000078 BC 32 00 64 64 00 00 00 00 00 00 00
00000084 BD 3A 00 64 64 00 00 00 00 00 00 00
00000090 BE 22 00 51 33 13 00 11 1B 00 00 00
0000009C BF 32 00 64 64 06 00 00 00 00 00 00
000000A8 C0 32 00 64 64 02 00 00 00 00 00 01
000000B4 C1 32 00 50 50 92 A1 00 00 00 00 00
000000C0 C2 22 00 13 31 13 00 00 00 0D 00 00
000000CC C5 12 00 64 64 00 00 00 00 00 00 00
000000D8 C6 10 00 64 64 00 00 00 00 00 00 00
000000E4 C7 3E 00 C8 C8 00 00 00 00 00 00 00
000000F0 F0 00 00 64 FD FE 00 00 00 3F 19 16
000000FC F1 00 00 64 FD 7C B2 16 57 01 00 00
00000108 F2 00 00 64 FD 9F E3 E1 FA 00 00 00
00000114 FE 32 00 64 64 00 00 00 00 00 00 00
Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B
00000000 01 0F 00 53 40 74 89 DB 0B 00 00 00
0000000C 03 03 00 64 64 00 00 00 00 00 00 00
00000018 04 32 00 5F 5F 91 15 00 00 00 00 00
00000024 05 33 00 64 64 00 00 00 00 00 00 00
00000030 07 0F 00 49 3C 42 ED 3F 01 00 00 00
0000003C 09 32 00 62 62 1B 09 00 00 8F 93 2A
00000048 0A 13 00 64 64 00 00 00 00 00 00 00
00000054 0C 32 00 64 64 45 00 00 00 00 00 00
00000060 B8 32 00 64 64 00 00 00 00 00 00 00
0000006C BB 32 00 64 64 00 00 00 00 00 00 00
00000078 BC 32 00 64 64 00 00 00 00 00 00 00
00000084 BD 3A 00 64 64 00 00 00 00 00 00 00
00000090 BE 22 00 52 33 12 00 11 1B 00 00 00
0000009C BF 32 00 64 64 06 00 00 00 00 00 00
000000A8 C0 32 00 64 64 02 00 00 00 00 00 01
000000B4 C1 32 00 50 50 8A A1 00 00 00 00 00
000000C0 C2 22 00 12 31 12 00 00 00 0D 00 00
000000CC C5 12 00 64 64 00 00 00 00 00 00 00
000000D8 C6 10 00 64 64 00 00 00 00 00 00 00
000000E4 C7 3E 00 C8 C8 00 00 00 00 00 00 00
000000F0 F0 00 00 64 FD FE 00 00 00 D3 8B 15
000000FC F1 00 00 64 FD 7C B2 16 57 01 00 00
00000108 F2 00 00 64 FD 9F E3 E1 FA 00 00 00
00000114 FE 32 00 64 64 00 00 00 00 00 00 00
It would appear that the end of the ROM is used for temporary, nonvolatile storage.