Re: [REQUEST] Option for skipping unreadable blocks on Video DVD

Pavel Machek
2007-11-26T12:16:45Z

Hi!

> > I think that if they are using the normal block layer accesses on the
> > DVD device, there may be some retries that occur which are likely
> > undesirable in this case since they will just stall playback. If they
> > are using SG_IO to feed raw requests into the drive (which I imagine
> > they need to do for CSS authentication, etc. anyway), then all error
> > handling is passed up to the user application.
>
> Normal apps like cp are ending because of Input/Output error.
> I did some researches and
> dd if=/dev/hdc of=image.iso conv=noerror,sync bs=1M
> does everything I want for whole Video Dvds. It skips unreadable blocks.
> But I get recorded tv shows from friends and there is the same as with
> scratched dvds. Now the problem is that there are several .avi files on it.
> So I cannot use dd.

dd works with files.

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