It’s maintained by the GNU project.ĭdrescue copies data from one file or block device to another, trying to rescue the good parts first in case of read errors, scheduling reads inside bad (or slow) areas for later. ddrescue is one of our favorite data recovery tools. The longer it takes to copy your data, the more data is at risk. A drive may degrade with each attempt to access it. When rescuing data from a dying hard drive, time is of the essence. Linux is an excellent operating system to recover data with a wide variety of open source tools designed to clone and recover data from failing drives. For details of all tools in this series, please check the table in the summary section. Anyone who cares about preserving their data should invest a bit of time in learning about this utility. For this article, we’ll look at ddrescue.
#Ddrescue gui series
The series examines both graphical and text based open source utilities. These are small, indispensable utilities, useful for system administrators as well as regular users of Linux based systems. Look for other posts within these fora for more details, or elsewhere on the web.This is the tenth in our series of articles highlighting essential system tools.
#Ddrescue gui license
I ended up using a version of Microsoft's disk scanning utility "chkdsk" (no additional license required) that worked a lot better than the one in XP to recover from errors on my NTFS partition.
#Ddrescue gui download
If you search it out on the web you can download it (the best place to get it, back when I needed it, was a Thai server) and there are a LOT of great tools on there. Should I allow dd_rescue to complete or is there some way of forcing the hard drive from being unmounted?It sounds to me like a pretty severe situation I've been advised by others in this forum to use "Hiren's Boot CD" in the past when Knoppix was insufficient. I have allowed dd_rescue to run for well over an hour scrolling errors. However, once dd_rescue reads a bad sector, the hard drive appears to become unresponsive (unmounted?) and dd_rescue starts scrolling a lot of errors. So running Knoppix 6.2.1, I was hoping to recover any files that are still readable with dd_rescue. It is like the drive was disconnected from the USB port.
#Ddrescue gui windows
In Windows XP, I can access the drive until a bad sector is read and then the drive becomes unresponsive. The drive has one NTFS partition and is in an external USB enclosure. I am using Knoppix 6.2.1 and dd_rescue to try and recover files from a failing hard drive with bad sectors. I tried knoppix 3.9 and knoppix 6.0.1 and they would give me a /dev/hda even if LBA 0 was bad. Interestingly, knoppix 5.1 wouldn't even give me a /dev/hda in the device directory as it couldn't read the partition table in LBA 0 and kept retrying ad infinitum. With dd_rescue I was able to get most of the good data off of this drive. I had a failing hard drive whose LBA sector 0 was completely unreadable. I like to use this as a read test to see if an entire hard drive can be read. Note that the command line syntax is much different from dd.įor example, "dd_rescue /dev/hda /dev/null" will copy from /dev/hda to /dev/null. "dd_rescue" without parameters will give you a list of command line parameters. I don't know if this has been covered before, but knoppix includes the program dd_rescue which is really a brilliant program for copying/imaging hard drives with bad sectors.ĭd will give you lots of trouble when it encounters bad sectors, usually truncating the output or exiting when it gets a read error.
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