[harry12]

My friend, - you need an expert hacker, or one of those companies that "recovers" lost data (for a Fee!). Of course if you have the original data and the issue is you want the CD to work (not unreasonable), then one might wonder if you aren't an expert yourself as I cannot imagine how to make a CD write under DOS - programs like Nero appear to be fixed into Windows, although there are Linux writers and I presume that in the final analysis the disc is only recording 0 -or-1, so it must be possible. Maybe you slipped-up with the multisession? - and when reading, it thinks it was closed - ie you don't have the "subsequent list of contents" and your writing session didn't check this before recording the next data. Indeed the next data may not be recorded at all - perhaps that is the question behind your query. . . . . .shut-up harry!
I'll close now., having little else to suggest - but I'd like to know: why DOS?