AFAICT Firebird 4F modules differ from earlier 4F modules in that they have an additional adaptive section at the end. The data (little-endian) appear to have large drive-to-drive variations but relatively little head-to-head variation within each drive.
WD10JMVW-11S5XS0, 4F, ver 0003001U, 4 heads
Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
000001F0 00 00 90 AA 00 00 98 33 2E 0A
00000200 7C D8 26 0A DC 49 27 0A 09 1F 24 0A 00 00 00 00
00000210 00 00 00 00 61 3B 91 FF 72 A3 CE FF 46 8F CD FF
00000220 B3 FE D3 FF 00 00 00 00 00 00 00 00
head 0 head 1 head 2 head 3
98332E0A 7CD8260A DC49270A 091F240A 00000000 00000000 group #1
613B91FF 72A3CEFF 468FCDFF B3FED3FF 00000000 00000000 group #2
WD10JMVW-11S5XS0, 4F, ver 00030078, 4 heads
Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
000001F0 00 00 90 AA 00 00 04 2B 4A FC
00000200 37 2B 12 FC AE 8E 17 FC E3 44 14 FC 00 00 00 00
00000210 00 00 00 00 A1 C8 86 09 CB D8 5F 09 AC 32 6F 09
00000220 26 E8 69 09 00 00 00 00 00 00 00 00
head 0 head 1 head 2 head 3
042B4AFC 372B12FC AE8E17FC E34414FC 00000000 00000000 group #1
A1C88609 CBD85F09 AC326F09 26E86909 00000000 00000000 group #2
WD10JMVW-11AJGS1, 4F, ver 0002000C, 4 heads
Code:
2C9DD20B 127CC70B 860AC80B 6E08C30B
0C389AFD 598E58FD A0565BFD 72905DFD
In the above examples the adaptive data appear to be clustered as follows (big-endian):
Code:
group #1 group #2 model version
----------------------------------------------
FFxxxxxx 01xxxxxx WD10JPVT-75A1YT0 00030038
0Axxxxxx FFxxxxxx WD10JMVW-11S5XS0 0003001U
FCxxxxxx 09xxxxxx WD10JMVW-11S5XS0 00030078
0Bxxxxxx FDxxxxxx WD10JMVW-11AJGS1 0002000C
There appears to be no consistent relationship between the first group and the second group.
FWIW, here is the same section from a different model:
WD1001X06X-00SJVT0, 4F, ver 0002000C, 4 heads
Code:
Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
000001B0 00 00
000001C0 90 AA 00 00 00 00 A0 01 00 00 E0 01 00 00 E0 01
000001D0 00 00 D0 01 00 00 50 06 00 00 38 06 00 00 30 06
000001E0 00 00 38 06 00 00 00 00 00 00 00 00 00 00 00 00
000001F0 00 00 00 00
head 0 head 1 head 2 head 3
0000A001 0000E001 0000E001 0000D001 group #1
00005006 00003806 00003006 00003806 group #2
The resolution appears to be 0x80000. This seems extremely coarse when compared with the Firebird models. The new drive has a dual actuator with a piezo element for fine positioning. Could this be a clue? Could these be runout parameters?