• From: California, USA
  • Registered: 2008-01-06
  • Posts: 37

I'm getting a weird write offset for this disc. I dumped it with a Plextor 760A with a read offset of +30. Running the D8 command provides this output:

CB2AAB2343258DA759C6C6AEAE80001C
7C759D9B55D70362FD95FDD37DE19DF4
15FB337F299C629595D3536181941C13
35B1AB48030AFDBB7DCF1DE875F2DB79
E71EB6F40ABB3B4F2F08607AD45F6304
55BF035B827662256A18AC893E6553E8
BE4D33F616454D70B627B55934B954B0
759E1DAEF5C03B6C6F11907010587046
D84EA6C806AAFE837C1D9DB5D5CB636B
15933351A980029C7DD59DE355F5837B
5D9F05D47F631C55B5834B5D8B05DB3F
672C56E182B41DCB35EB2B732319A5B6
874A9ECB542B03233DA5ADC741EECC30
29A86282D5DDE365F5977B52DF01E47C
371DAAF5C37B6D9F11D470231865B6D7
4AA2CB45EB0F733859AEC6802E9C6015
9473531981B69C0A95BB534F01887C1A
DDB765CAD76B62D315E1B374099B3A97
2F52E041F44C3B09AF3A806F5C504580
4F5C48458ACF5B684712CEF1E83832EE
E9F032B869CED2A821C2E42DF721FAE4
3F772C5AE187741EDB34272B26E326B5
A68B469B0E973812EEF1F038386EEED0
3020686452D701E2FC35FDAB7DC31DED
B5F1CB782B1EE33435AB2B43230DA5B9
C74EAEC8002AFC637D959DD355E18374
1D9B35D72B62E315F5B37B499F0A947B
531F01B47C0B1DBB35CF2B686312D5B1
E348358AEB5B730719BEF68C3A99AF56
80429C5A2A763C856A58F4C1549BB4A0
BCB3FA3E08DBAD30CE1797CD2D161E0D
4B8D692EAB2003247DA71DC6F5EEBB70
0F187876DEDAA4274726CEE6A83682EA
9DF355F9837E9D9C15D5B36349958A93
5B5187001EFC743D9B2DD721E2E435F7
2B7AE31F75B45B4B070B3EFB2C3F21AC
6401973C12EDB1F1C8382AEEE3703598
6B56D302A1BDC40DEF39F06EB8500EC0
782C5EE184341F2B34632B15A33345A9
8F42984DD6C9E2AAB5C34B6D8B11DB30
272866E2D6B5E28B75DB1B673716EAF2
B379C99EAA9403533D81ADDC01E5BC37
4DAAC9C36AAD9341D18C2019A476871A
9EF7543AC32F6DA051C4402F0C607994
5E930411BF300C687992DE91E4103730
6AE85372C199EC16B1B28809DAFAA77F
46DC4EA588075AFEC77C2EDDA025C467
6F16D072A059C446AF0E80781C5EF584
3B5F2F04607F145C730599BF568C4299
8DD699E296B5D28B61DB14273326E9A6
B28689DE9AA4174732CEE9E832B2E9C9
F2AAB9C34EAD8801DAFC277DA6DDC6A5
EE87701ED87426DB26A72686E69EB694
0A933B9F1B94B30F0FCEAED7878D3136
07C55100AFD32F0805585208BE0533C0
9692DC8181DC1C25B5A74B46CB0EAB38
032EFDA03DC46DEF11F07038586EC6D0
2EA06004547F031C7DB59DCB55EB0373
3D99ADD681E29C35D5C98181D74F719B
0B44685C4196DF41379CEB65C3176DB2
D1C9E02AB4634B152A3099EB45C01CC5
D437632AD5A36345958F53584186CC1E
A9B4028B3DDB2DE721F6E43AB72F4AE0
4B744B1B0B373B2AEF237065985756C2
C2ADEDC1F1EC3831AEE80032FC69FD92
BDD1CDE029F462BB15EFF32988907390
E050B4606B24532701A6FC06BDBE8DCC
19E9B6B28A89DB5AA70746FECEBC280D
A2F9C5FEAF7C005DBC45CD8F69D852A6
C1C6AC2E81A01C0475BF1B4C77099AFA
977F52DC41E58C3759AAC6836E9D9015
D073403B768451CC9279100EF078385E
EEC4302F286062D455E30375BD9B4DD7
09E2FAB5FF4B7C4B1D8B35DB2B672316
E5B2B749CACAAB6B43130DB1B9C80EAA
F8037EFD9C3DD5ADE341F58C3B59AF06
807E9C5C1585B35F49844A9F0B547B03
1F3DB42E0F95289390EB0A601047231D
B6E699E5C5E4DD22F4585755663CA952
7D7E46BF25E5A77746DACEA76806D2FE
A1FC043DBF2DCC61E994329329D1A2A0
05C47F6F1C5075805B5C47058EFF583C
46ED8EB1D80826FAE6F0A4DE08CBD504
CC90C67F8173B3F6657726B7656F55A1
AB44030F3DB86DCE9B1A7260B6BBC7F2
BAF1CF78285EE2C435EF2B70631855B6
C34AAD8B41DB0C2739A6EE86B01E8874
1ADB37672AD6E362B595CB536B01933C
11ADB001C87C2ADDA365C5976F52D041
E04C3449AB0A223EF5830A504E3DAC41
6A8ED290DFCEB80F573842EECDF029F8
62BED5CC2369A5928751DEC0242C6721
96E412B731CAE82B72E319F5B6BB4A8F
0B587B06DF3EA46C0711BEF00C3879AE
DE80241C673596EB52B301C9BC2A8DA3
59C506E08CD2164EBD1E886B5AD30761
BED40C2339A5AE87401ECC74299B2297
25D2E761F6D43AA32F45A04F44484F0A
C87B6ADF136471971812F6F1FAB83F4E
EC48318AE81B72F719FAF6BF7A8C5F59
84469F0E9478131EF1B4380B2EFB203F
246C671196F012B871CED82826E2E6B5
F68B7A9B1F573442EBCD9F440651417F
F3E3C6BF9E8B541B03373DAAEDC371ED
9831D6E822B2E5C9F76ABAD34F618854
1AC3376DAAD1C3602D9461D31421B324
09A73A86EF5EB0440815C557F0F54FCC
FFDE0BD38C962E25D7308661D16D031A
8825A2E745F6CF7A39A0DD5BD210F271
7AB85F4EC4482F0AE07B745F1B04773F
1AEC77719AD81766F2D6B9E28EB5D80B
66FB16BF328C69D992A691C6902E9060
10547043184DB6C9CAAAAB43430D8DB9
D9CEA6A844A86E8844EEA38C2296A2F5
6B6E0EE51A053B1415B33349A98A829B
5DD705E2FF75FC5B7D871DDEF5E43B77
2F1AE077745ADB07673ED6EC22B1A5C8
076AFED37C219DA415C7336EE9903290
69D052A041C44C2F09A07A845F5F0444
7F0FFC428A0144CBD85026FDA6BDC68D
EE99F016B8728ED9D826A6E686B69E8A
941B533701AAFC037DBD9DCDD5E9E372
B599CB56A5809408F1275FD0FB7AD7C7
B9D45EDC5E95CBB3677F59EEFB925203
FB70C44E1D23B6BD78B4046E02EBDEF5
18119CF0C810568FA0349AD6DA598A67
0803AF35E308B91360C74A1E49AE7B64
33D280CEB125D81B18340B1E173B05B2
D5760658FD95EB0E76E7FFFFD159A1DA
97014814AB5BDBAB3580070BB43D936F
554B4C13067FB07FBEB91CB37D455EF7
8C544B973BF1F660F47F6304822DA3BE
4EF50CE6ECA9CFA6A26EE990979E1473
5542E2934E3183F77BD8EDA3578E3856
3B5C8E5B2EF6D8B3F4389F9757387A7F
DCCC33C720D40FB4F0971033EA91F46E
E02508640389228F23450E76A354B1C0
B4F2517BA5F1F91342AB66F4D4189F61
C07C3A9429E4CFDCCE27AC3FC139A428
50D8BE70E3295537A9453A3800FFFFFF
FFFFFFFFFFFFFF00018202620028081E
8008680655FF037C7D9D9DD5D5E36375
959B53570182FC1DFDB5FDCB7DEB1DF3
35F9AB7E831C1DB5B5CB4B6B0B133B31
AF280062FC55FD837DDD9DE5D5F7637A
D59F63545583035DBD854C2D961BAD48
FE3503E47DA31DC5B5EF4B704B184B36
80C08080808080C080808080808080C0
80808080808080C08080808080808080
80808080808080808080808080808080
80808080808080808080808080808080
808080808080C0808080808080808080
8080C080C08080808080C0C08080C080

Would this be 139.75 x 4 = 559 - 30 for read offset, total of +529 write offset? There are no audio tracks so I can't detect the write offset with audio.

  • iR0b0t
  • iR0b0t
  • Administrator
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  • From: Research equipment
  • Registered: 2008-02-21
  • Posts: 6,703

you should read Offset detection using the D8 read command topic

but i will simple tell you what is to do:

- you count first all shown lines 139.75 x 4 = +559 (that was correct)

- by FFFFFFFFFFFFFFFFFFFF000182026200, you have to go back 2 full sectors -> 2 * (-588) = -1176
- by FFFFFFFFFFFFFFFFFFFF000182016200, you have to go back 1 full sector -> 1 * (-588) = -588
- by FFFFFFFFFFFFFFFFFFFF000182006200, you have only to count the lines
- by FFFFFFFFFFFFFFFFFFFF000181746200, you have to go forward 1 full sector -> 1 * (+588) = +588
- by FFFFFFFFFFFFFFFFFFFF000181736200, you have to go forward 2 full sectors -> 2 * (+588) = +1176

in your case you have also +559 samples from lines and -1176 from header = -617 (combined offset, that you will need for EAC correction or (-1) * (-617) = +617 if you wanna use it in perfectrip)

for factory write offset just substrate "drive offset" from "combined offset" = -617 - (+30) = -647 (needed for db)

that's all !!!
happy dumping now !!!
big_smile

PX-760A (+30), PX-W4824TA (+98), GSA-H42L (+667), GDR-8164B (+102), SH-D162D (+6), SOHD-167T (+12)
  • From: California, USA
  • Registered: 2008-01-06
  • Posts: 37

I read that topic about the D8 command, but didn't know what to do after I had +559. The topic isn't as clear as your post about going back or forward sectors. You guys need to add this D8 write offset detection to the dumping guide on the main page. It's very helpful for data only dumps.

  • iR0b0t
  • iR0b0t
  • Administrator
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  • From: Research equipment
  • Registered: 2008-02-21
  • Posts: 6,703

I know, but they are lazy roll

PX-760A (+30), PX-W4824TA (+98), GSA-H42L (+667), GDR-8164B (+102), SH-D162D (+6), SOHD-167T (+12)
  • Registered: 2006-12-24
  • Posts: 3,847

Not 'they' - only one guy has access to the pages themselves (guess, who? smile).