[plug] Getting data off a damaged DVD

[Richard Meyer]

On Sun, 2006-07-02 at 23:07 +1000, philC wrote:
> Senectus et al
> 
> dd is the best lower level copier I know. Any lower and you probably have to 
> over ride the cd firmware driver, which itself has several layers of error 
> control ( as every cd will have some errors but crc's and the like make them 
> not critical).
> dd gracfully skips after (several?) tries at bad files, much as cp seems to 
> do but much quicker- so much so I scrapped the trial cp of cd before it 
> finished. Much better than windows copy which spits the dummy after 
> encountering first error. Interestingly the trial dd iso file size was 
> smaller than the copied contents using cp which hadn't completed it task.

Just realised  that there's something else as well - "ddrescue" which is
described as:
> Dd_rescue helps when nobody else will: your disk has crashed and you
> try to copy it over to another one. While standard Unix tools like cp,
> cat, and dd wail "abort" on every I/O error, dd_rescue will not.

This may be of some use.

-- 
Richard Meyer <meyerri at westnet.com.au>