1 (edited by Jackal 2011-06-12 15:42:19)

Topic: CD/DVD scratch location map

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      1,438,000

could 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

Re: CD/DVD scratch location map

Would it be possible to create a function that outputs GD-ROM sector locations as well? It sounds so trivial but I'm not exactly a genius at maths tongue Any help would be highly appreciated & rewarded with new Dreamcast dumps ^^

The 1st sector (#45000) is ROUGHLY at r=3.0cm, the last (#549150) at r=5.8cm smile