Re: [Bug-ddrescue] Best options for rescuing a DVD?

[Harri Järvi]

On 19.06.2011 09:38, Ian Oliver wrote:
> The third is different. I'm now in day 3 and have rescued 2471MB. I
> don't know how much data is on the disk: ddrescue went for all 4GB+ but
> I suspect that some sectors are missing at the start such that the size
> is unknown. Which driver/layer/device is responsible for determining
> size of tha DVD?

If the filesystem is ISO-9660 you could try isoinfo tool which is part 
of genisoimage.

isoinfo -d -i /dev/cdrom

It should list the block size and the number of blocks among other 
information from the primary volume descriptor of the filesystem
if its available.

--
Harri