Is Blue-Ray and HD DVD Storage Destined To Failure?

[John Slade]

Difficult with MODs, since they are ISO standardized and have to pass
pretty strict tests. Sure, you could make non-ISO MOD media, but
likely would run into legal troubles. Nobody has ever tried this
AFAIK. For example, MODS have to be 100% surface certified. You can
read there manufacturer defect list. The drives have to perform a
verify with stricter margins and reallocate or fail the write if the
sector is not written fine (unless the user has turned the verify
off explicitely by flipping a dip-switch. Bad idea.).

So, no, I own about 50 MOD media that have been in use for something like
8 years. I have not lost a single byte and I have had to clean and
reformat two of them (they were still fully readable).

I agree that MOD technology is a lot better than DVDs and CDs. But I
don't think the reliability of CDs and DVDs is as bad as people think.

I have tried that. It did fail eventually, but note the failure mode:
It failed on additional writes, while it still did read fine. After
cleaning and reformatting, it was back to the original manufacturer's
defect list.

You didn't try hard enough! I'm sure I could make a MOD disk
unreadable if I really tried.

John

 

[Arno Wagner]

I agree that MOD technology is a lot better than DVDs and CDs. But I
don't think the reliability of CDs and DVDs is as bad as people think.

Well, my personal experience suggetst it is actually a lot worse.

You didn't try hard enough! I'm sure I could make a MOD disk
unreadable if I really tried.

Physical destruction does not count! Break it, scratch it through
its hard plastic shell or heat it up to >210C and, yes, the data
will be hard or impossible to recover.

Arno