Program to copy data from a bad disk?
Brad Davis
brd at FreeBSD.org
Sat Apr 5 00:47:33 UTC 2008
On Fri, Apr 04, 2008 at 05:03:09PM -0700, LI Xin wrote:
> Hi,
>
> Recently my hard drive goes bad again, which has a lot of bad sectors
> for unknown reasons. I am looking for some software that is capable of
> doing a sector-to-sector copy of the hard drive.
>
> I have tried dd but with conv=noerror,sync it would just fill 0's for
> the whole block size (say, in order to get best speed you will want
> bs=128k or even larger, but that means that you will lose data when 1
> of these 256 sectors is bad). Is there any program that is smarter
> which do a sector-to-sector copy for these failed blocks and use larger
> transfer buffer for others?
Hi Xin,
I recently found sysutils/dd_rescue and sysutils/ddrescue. I have never
tried them, but they are supposed to do what you want.
Regards,
Brad Davis
More information about the freebsd-chat
mailing list