I think it would come in handy if you know the exact location of a scratch, so the distance in mm to a certain sector position on a CD or DVD. For DVD's I found the following one:
RADIUS SINGLE DUAL
24.00mm = LBA 0 0
25.00mm = LBA 40,000 37,000
26.00mm = LBA 82,000 75,000
27.00mm = LBA 126,000 114,000
28.00mm = LBA 171,000 155,000
29.00mm = LBA 218,000 198,000
30.00mm = LBA 267,000 242,000
31.00mm = LBA 317,000 288,000
32.00mm = LBA 368,000 335,000
33.00mm = LBA 422,000 384,000
34.00mm = LBA 477,000 434,000
35.00mm = LBA 534,000 485,000
36.00mm = LBA 592,000 538,000
37.00mm = LBA 652,000 593,000
38.00mm = LBA 714,000 649,000
39.00mm = LBA 777,000 706,000
40.00mm = LBA 842,000 766,000
41.00mm = LBA 909,000 826,000
42.00mm = LBA 977,000 888,000
43.00mm = LBA 1,047,000 952,000
44.00mm = LBA 1,119,000 1,017,000
45.00mm = LBA 1,192,000 1,083,000
46.00mm = LBA 1,267,000 1,151,000
47.00mm = LBA 1,343,000 1,221,000
48.00mm = LBA 1,421,000 1,292,000
49.00mm = LBA 1,501,000 1,364,000
50.00mm = LBA 1,583,000 1,438,000could anyone make a similar one for CD's plz? One of my discs has a scratch @ sector 192000 but I can't make out its exact location. Thanks
edit: Here's STalKer-X's CD graph:
Sector[#] Radius[mm]
18500 28
38500 31
56500 39
89000 38
112000 41
135000 43
159500 46
190000 49
216000 51
240000 53
Any help would be highly appreciated & rewarded with new Dreamcast dumps ^^