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Re: [Bug-ddrescue] ddrescue to .img file...then what?

From: Dave Burton
Subject: Re: [Bug-ddrescue] ddrescue to .img file...then what?
Date: Tue, 03 Jun 2008 12:52:28 -0400 (EDT)

Hi Jubei,

To restore it to a new hard disk drive, just use ddrescue
to copy from the image file to the new drive.  Be sure to
specify a different logfile, so that you don't wipe out
your good log file from the recovery process.

E.g., if your recovery command sequence was like this:

  fdisk -lu /dev/hdc >fdisk-lu_out.txt
  hdparm -d1 /dev/hdc
  hdparm -a256 /dev/hdc
  hdparm -A1 /dev/hdc
  blktool /dev/hdc read-ahead 256
  ddrescue -B -n -S /dev/hdc drive.ima drive.log
  hdparm -a8 /dev/hdc
  hdparm -A0 /dev/hdc
  blktool /dev/hdc read-ahead 0
  ddrescue -B -c 8 /dev/hdc drive.ima drive.log
  hdparm -a0 /dev/hdc
  hdparm -A0 /dev/hdc
  hdparm -k1 /dev/hdc
  hdparm -K1 /dev/hdc
  ddrescue -B -c 1 -r 1 -d /dev/hdc drive.ima drive.log
  hdparm -d0 /dev/hdc
  ddrescue -B -c 1 -r 2 -d /dev/hdc drive.ima drive.log
  hdparm -a256 /dev/hdc
  hdparm -A1 /dev/hdc
  blktool /dev/hdc read-ahead 256
  hdparm -d1 /dev/hdc

Then the restore-to-new-drive command would be:

  ddrescue -B drive.ima /dev/hdc restore.log

Also, since you are using Spinrite, you might want to use
some of my scripts, which you can download here:
(the last link on the page)

ncdave4life at gmail dot com but please no spam

address@hidden (jubei) wrote:

> Hello all,
> I'm new to this ddrescue thing so please be gentle :)   So I've got a drive
> I'm trying to get data off of that has lots of errors.  Here's my process so
> far:
> 1.) Ran SpinRite on it.  Initially, SpinRite had trouble reading it but
> after running it a few times, it was able to recover the first partition (a
> Dell recovery partition) so that it's readable in Knoppix.
> 2.) Ran TestDisk against it.  TestDisk can see the partitions but I don't
> want to go much further so I decided to...
> 3.) Run ddrescue against it.  I initially ran ddrescue to copy from the bad
> drive to an empty drive.  It looks like it ran through but the new drive was
> unreadable by TestDisk or Find and Mount.   One caveat: in Windows, the new
> disk showed up as uninitialized.
> 4.) Last night I ran ddrescue against it again but this time creating an
> image on my NAS.  It's about 35GB through an 80GB disk.  Hopefully at the
> end I'll have a full image of the drive so that the person I'm doing this
> for can send it back to Dell (she has 10 days to send  it back and I'm on
> day 5).
> So my question is, what do I do with the disc image after it's done?
> Everything I've read says that I should restore it to a new clean drive and
> run chkdsk against it.  But I don't know how to restore it to that drive and
> am worried I'll be in the same boat as I was when I copied drive to drive.
> Anyone have any ideas on how I should proceed?  THANK YOU SO MUCH IN
> -jubei

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