[Galaxy S I9000 Q&A, Help & Troubleshooting] RyanZA:
Here is some (likely irrelevant, but maybe it will help someone work it out?) information that appears in dmesg in regards to the OneNAND device:

1.
<4>[ 2.062865] [BIF:IN ] ++FSR_BML_Init(nFlag: 0x0)
2.
<4>[ 2.062887] [PAM: ] ++FSR_PAM_Init
3.
<4>[ 2.063667] [PAM: ] OneNAND physical base address : 0xb0000000
4.
<4>[ 2.063690] [PAM: ] OneNAND virtual base address : 0xe8980000
5.
<4>[ 2.063711] [PAM: ] OneNAND nMID=0xec : nDID=0x50 Page size=4
6.
<4>[ 2.063725] [PAM: ] --FSR_PAM_Init
7.
<4>[ 2.063815] [BIF: ] FSR VERSION: FSR_1.2.1p1_b129_RTM
8.
<4>[ 2.063841] [OND:INF] FSR_OND_4K_Open(nDev:0, pParam:0xc4f83e00, nFlag:0x00000000) / 1033 line
9.
<4>[ 2.063859] pstOND4kCxt->nBaseAddr: 0xe8980000
10.
<4>[ 2.063875] nDev=0, nMID=0x00ec, nDID=0x0050, nVID=0x013e
11.
<4>[ 2.063891] [OND:INF] pstOND4kCxt->nSysConf1:0xf006 / 1116 line
12.
<4>[ 2.063906] [OND:INF] pstOND4kCxt->nBlksForSLCArea[0]:2048 / 1133 line
13.
<4>[ 2.064097] [OND:INF] Transfered 4096 bytes to DataRAM in 162 usec
14.
<4>[ 2.064111] calculated Word Write Cycle: 78 nano second
15.
<4>[ 2.064256] [OND:INF] Transfered 4096 bytes from DataRAM in 129 usec
16.
<4>[ 2.064270] calculated Word Read Cycle: 62 nano second
17.
<4>[ 2.064284] [OND:INF] pstOND4kCxt->nIntID :0x0000 / 1231 line
18.
<4>[ 2.064298] [OND:INF] 1X_CACHEPGM CMD : 0x007f
19.
<4>[ 2.064309] [OND:INF] 1X_PLOAD CMD : 0x0003
20.
<4>[ 2.064592] [BBM:INF] Scan from 2004 to 2047 to find BML meta blocks (die: 0)
21.
<4>[ 2.064816] [BBM:INF] ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff
22.
<4>[ 2.066853] [BBM:INF] ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff
23.
<4>[ 2.068935] [BBM:INF] ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff
24.
<4>[ 2.070972] [BBM:INF] ffff ffff ffff ffff ffff ffff ffff ffff ffff ffff
25.
<4>[ 2.073042] [BBM:INF] a5a5 a5a5 ffff
26.
<4>[ 2.098443] [BBM: ] << DevNO:0, DieNO: 0 MAPPING INFORMATION >>
27.
<4>[ 2.098457] [BBM: ] Bad Mark Information
28.
<4>[ 2.098469] [BBM: ] - Bad Mark (0x2222) by erase error
29.
<4>[ 2.098482] [BBM: ] - Bad Mark (0x4444) by write error
30.
<4>[ 2.098725] [BBM: ] 0000: Sbn[ 98]==>Rbn[ 2042] / BadMark: 0x0000 / SLC / Lock: UL
31.
<4>[ 2.098748] [BBM: ] << Total : 1 BAD-MAPPING INFORMATION >>
32.
<4>[ 2.098763] [BIF: ] nPartition Information (nVol : 0)
33.

34.
<4>[ 2.098775] nVer : 0xffffffff
35.
<4>[ 2.098789] 00 / nID:0x00 / nAttr:0x00001002 / 1stVun: 0 / Units: 1
36.
<4>[ 2.098807] 01 / nID:0x01 / nAttr:0x00001002 / 1stVun: 1 / Units: 1
37.
<4>[ 2.098825] 02 / nID:0x20 / nAttr:0x00001101 / 1stVun: 2 / Units: 40
38.
<4>[ 2.098843] 03 / nID:0x03 / nAttr:0x00001002 / 1stVun: 42 / Units: 5
39.
<4>[ 2.098861] 04 / nID:0x04 / nAttr:0x00001002 / 1stVun: 47 / Units: 5
40.
<4>[ 2.098879] 05 / nID:0x21 / nAttr:0x00001101 / 1stVun: 52 / Units: 20
41.
<4>[ 2.098896] 06 / nID:0x06 / nAttr:0x00001002 / 1stVun: 72 / Units: 30
42.
<4>[ 2.098914] 07 / nID:0x07 / nAttr:0x00001002 / 1stVun: 102 / Units: 30
43.
<4>[ 2.098932] 08 / nID:0x22 / nAttr:0x00001101 / 1stVun: 132 / Units: 1146
44.
<4>[ 2.098950] 09 / nID:0x23 / nAttr:0x00001101 / 1stVun: 1278 / Units: 536
45.
<4>[ 2.098968] 10 / nID:0x24 / nAttr:0x00001101 / 1stVun: 1814 / Units: 140
46.
<4>[ 2.098986] 11 / nID:0x11 / nAttr:0x00001002 / 1stVun: 1954 / Units: 50
47.
<4>[ 2.099005] [BBM:INF] The registered blocks in ERL are handled
48.
<4>[ 2.099018] [BBM:INF] (number of blocks: 0)
49.
<4>[ 2.109453] BML: Registered BML Driver.
50.
<4>[ 2.146634] [BIF:IN ] ++FSR_BML_Init(nFlag: 0x0)
51.
<4>[ 2.146659] [BIF: ] FSR_BML_Init(nFlag:0x0, nRe:FSR_BML_ALREADY_INITIALIZED) / 1034 line
52.
<4>[ 2.156468] FSR: Registered STL Driver.
53.
<4>[ 2.326875] [BIF: ] FSR VERSION: FSR_1.2.1p1_b129_RTM
54.
<4>[ 2.326908] [BIF: ] FSR_BML_Open(nVol:0, nFlag:0x0, nOpenCnt:2) / 1176 line
55.
<4>[ 2.326986] [SIF:INF] ===> STL Clst[ 1] Scan Root Info
56.
<4>[ 2.327780] [SIF:INF] ===> STL Zone[ 1, 0] Open Zone Meta
57.
<4>[ 2.328963] [SIF:INF] Latest Header Index ( 1) Vbn ( 3)
58.
<4>[ 2.329912] [SIF:INF] Latest Header Clean Page Offset ( 4)
59.
<4>[ 2.329927] [SIF:INF] POR write timer : 0x74
60.
<4>[ 2.330144] [SIF:INF] Latest Context BlockIdx ( 1) Offset ( 3) Vpn ( 195)
61.
<4>[ 2.330371] [SIF:INF] Number of Free Block ( 4)
62.
<4>[ 2.330385] [SIF:INF] Active Log List : Num ( 1)
63.
<4>[ 2.330399] [SIF:INF] ===> STL Zone[ 1, 0] Open Zone Post
64.
<4>[ 2.330614] [SIF:INF] Partition [0, 21] open is success
65.
<4>[ 2.339451] [SIF:INF] Zone[ 1, 0]: nDgn( 2) nVbn( 12) S( 0)-E( 11) nCPOffs( 12)
66.
<6>[ 2.354295] param_init
67.
<6>[ 2.363111] load_lfs_param_value: param.blk read successfully.
68.
<4>[ 2.365465] [BIF: ] FSR VERSION: FSR_1.2.1p1_b129_RTM
69.
<4>[ 2.365497] [BIF: ] FSR_BML_Open(nVol:0, nFlag:0x0, nOpenCnt:3) / 1176 line
70.
<4>[ 2.365537] [SIF:INF] ===> STL Clst[ 2] Scan Root Info
71.
<4>[ 2.366343] [SIF:INF] ===> STL Zone[ 2, 0] Open Zone Meta
72.
<4>[ 2.377062] [SIF:INF] Latest Header Index ( 16) Vbn ( 18)
73.
<4>[ 2.379315] [SIF:INF] Latest Header Clean Page Offset ( 11)
74.
<4>[ 2.379330] [SIF:INF] POR write timer : 0x62
75.
<4>[ 2.379969] [SIF:INF] Latest Context BlockIdx ( 16) Offset ( 10) Vpn ( 1162)
76.
<4>[ 2.380206] [SIF:INF] Number of Free Block ( 2)
77.
<4>[ 2.380219] [SIF:INF] Active Log List : Num ( 8)
78.
<4>[ 2.380234] [SIF:INF] ===> STL Zone[ 2, 0] Open Zone Post
79.
<4>[ 2.381760] [SIF:INF] Partition [0, 22] open is success