Alternatively, specify 1 or more retry passes. Robert Trevellyan
On Mon, Oct 28, 2019 at 5:52 PM Robert Backhaus <rob...@robbak.com> wrote: > You need to specify -A (--try-again), or it won't retry reading blocks that > were previously marked as bad. This will work as long as both disks really > are identical - especially watch out that there is no offset. > > On Tue, 29 Oct 2019 at 07:47, King Marzo <ds1...@hotmail.com> wrote: > > > Hi, > > > > I'm trying to use ddrescue to recover the data from a Linux raid 1 where > > both disks have errors. I ran ddrescue to get the data from the first > disk > > onto a new disk, but I'm not sure how to run it on the second disk, and > > I've scoured the Internet for two days now and can't find what command I > > actually need to run to do this. I thought all I needed to do was to run > > the exact same command as I did for the first disk but just change the > > source drive to the second disk. > > > > I first ran: sudo ddrescue -f -n /dev/sdb1 /dev/sdd /root/recovery.log > > Once that had completed, I ran: sudo ddrescue -f -n /dev/sdc1 /dev/sdd > > /root/recovery.log > > > > Note that all I did was change the source drive from sdb1 to sdc1, but > the > > second pass instantly completes with the exact same summary as the first > > pass, so I get the impression that it didn't do anything at all...but > maybe > > I'm not doing it right? > > > > Sorry if this is not the right place to ask questions about this, but I > > couldn't find any forum for this or IRC channel or anything, and the gnu > > page for ddrescue did say to write to this email address for help, so I > > hope it was alright to email this address. Or if not, do you know of a > > better place that I could ask this question? Thanks! > > > > Sincerely, > > > > David > > >
