Re: How to force copy retries until finally copied all due to a dying old HDD in Linux?

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Subject	Re: How to force copy retries until finally copied all due to a dying old HDD in Linux?
Date	Thu, 19 Feb 2015 22:15:25 -0500
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In article <m968gb$ng5$1@dont-email.me>,
William Unruh  <unruh@invalid.ca> wrote:
> On 2015-01-14, Ant <ant@zimage.comANT> wrote:
> > On 1/13/2015 6:39 AM, Robert Nichols wrote:
> >
> >>> Ah. Well, I ended up with a brand new 2 TB WD HDD (partitioned in half
> >>> with EXT4 FS) and my hardware friend replaced the dying HDD in my PC.
> >>> Dying HDD is my
> >>> sdg(5 is the one I want to copy) and the new HDD partition I am making
> >>> an image is in /media/Storage2b/CopiedDyingStorage and 1 TB better be
> >>> enough. I hope
> >>> I am doing this correctly for over a day so far:
> >>>
> >>> # time ddrescue /dev/sdg5 /media/Storage2b/CopiedDyingStorage
> >>> ImageFileLog
> >>>
> >>> GNU ddrescue 1.16
> >>> Press Ctrl-C to interrupt
> >>> Initial status (read from logfile)
> >>> rescued:     8641 MB,  errsize:  29099 MB,  errors:      42
> >>> Current status
> >>> rescued:     8641 MB,  errsize:  29099 MB,  current rate:        0 B/s
> >>> rescued:     8718 MB,  errsize:  71006 MB,  current rate:    16384 B/s
> >>>     ipos:    18350 kB,   errors:      56,    average rate:     1041 B/s
> >>>     opos:    18350 kB,     time since last successful read:       0 s
> >>> Splitting failed blocks...
> 
> I think that the reason it is taking so long is taht your disk is really
> really borked-- ie loads of it is unreadable. It keeps trying a few
> times to reread each sector, and cannot. I think you will need to wave
> goodbye to all of the data on that disk. 
> If the disk were good, it would be reading it at many MB/sec. 

I recovered files from a "dead" HD for my friend.  I forget how big it
was but I used essentially this method.  It was slow reading the source
and there was lots of clicking, but mounting the image and copying from
it ran at normal speeds.

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