help with the recovery of a head crash with a MS ntfs file system.

[Amedee Van Gasse (ub)]

On Fri, February 12, 2010 10:46, Knapp wrote:
>> The main reason to use ddrescue is that dd aborts on read errors (and
>> you
>> already know that there will be errors) and ddrescue doesn't.
>
> What?
>
> Anyway, aborting on read errors is good right? Because the software
> does not get stuck there looking over and over at the error?


No. You want the software to skip errors, not abort on them.

Suppose this is your disk:

ddddXXdd

d = data
X = error

With dd, you would get dddd. It would abort on the first X. You would
loose the data after the error.
With ddrescue you would get dddd00dd. The errors would be filled with nulls.