Re: ddrescue: detect repeated reads of the same data

[Antonio Diaz Diaz]

Hi Matheus,

Matheus Afonso Martins Moreira wrote:
> Also the forum comment suggests that the data might be read via repeated
> attempts which to my understanding is what ddrescue's scraping is all
> about. My rescue is still in the copying phase, how can I move all the
> non-tried blocks to the scraping phase?

The main difference between the copying phase and the other phases 
(trimming, scraping, retrying) is that the former reads data in large 
blocks, while the others read data sector by sector.

Instead of editing the mapfile, you may just use --cluster-size=1 to read 
sectors one by one. Note that ddrescue does not make repeated attempts at 
reading one sector, as this reduces the chances of rescuing the remaining 
good data.


Best regards,
Antonio.