23 Aug
2014
23 Aug
'14
15:20
On 2014-08-23 16:41, Greg Freemyer wrote:
Using a smaller blocksize helps, but the reality is that dd as it currently exists (to my knowledge) is not designed to operate optimally in the presence of real world media errors. ewfacquire on the other hand can to be told to read those same 1MB blocks, but if media errors occur to retry the read with ever smaller reads until only the bad sectors actually fail to be copied.
That's what both ddrescue and dd_rhelp (w. dd_rescue) do :-) -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" at Telcontar)