`GNU ddrescue` is a data recovery tool for block oriented media.

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Ddrescue: can the data differ if I have erroneously mounted the drive on windows?

I'm trying to rescue an USB ext HD 2TB using ddrescue on a linux VM, host is win. Everything worked fine, rescued almost all, there are 60MB of errors left to work out. So I had some problems on the ...
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Using DD Disk Image on Red Hat

How can I use dd command on a Linux Red Hat Server 5 to obtain a disk image and then use it eventually in Virtual Box?
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ddrescue: reread only good sectors?

Before imaging the corrupted filesystem to a file on another hard drive, I decided to dry-run ddrescue (throwing rescued output to /dev/null) just to see how much data is unreadable: # ddrescue -d -b ...
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Extracting DDrescue image file after pass 1

I am trying to recover data from a failing usb hard disk using ddrescue. I ran ddrescue for about 4 days at the end of which it completed pass 1. Sometime after it began with pass 2, I interrupted the ...
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DDRescue taking months but no errors?

'm having a hard time finding others with the same error, and I'm trying to figure out the best path forward. I have a hard drive that was unusably slow, and then stopped booting. The clonezilla ...
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How to change current copy position or skip over area in ddrescue

I'am currently trying to recover data from a failing 3TB WD Red drive using ddrescue. After two weeks I got about one TB, but then read speed doped to a few thousand bytes per second and it would now ...
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DDrescue sequence of operations?

So I'm running DDrescue on a 1.5tb drive. I left 'r' at 2, to attempt to cut down on time needed to complete the task. At 2 1/2 days, it's still going, and now it's making the first pass on retrying ...
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Unable to mount XFS after rescue, why?

I am facing a strange problem with XFS file system. Below is the exact scenario: I'd a corrupt 2TB disk with XFS (I/O error), so with that decided to rescue data from old disk to new disk. I'd run ...
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Mount .img created by ddrescue-gui

I'm trying to recover data after formatting my hdd. I installed ddrescue-gui and performed the following tasks: Select source (formatted hdd), no log, destination (img file inside separate hdd) and ...
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ddrescue image size on disk

I am using ddrescue on a damaged disk. When I began the recovery, I was saving the image to a local external drive. Then, since I needed to remove the external, I changed the location of the image ...
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Which sector size shall I choose to run ddrescue with direct access on an Advanced Format drive?

I started the imaging of an AF/512e HDD by first running a following command: ddrescue -n /dev/sdb2 drive_c.img mapfile.log Upon its completion I made a backup of mapfile.log and decided to run ...
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ddrescue image too large

3Tb HDD is corrupt. I tried using ddrescue to create an image and a logfile on another 3TB HDD (only one I had). I got a write error after about 2.7T (actual capacity of the 3TB). Image file and log ...
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How to ignore write errors while zeroing a disk?

Say you want to zero-out a failing hard disk. You want to overwrite as much as possible with zeros. What you don't want is: the process aborts on the first write-error. How to do that? AFAICS, plain ...
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79 views

ddrescue resuming rescue operation to a different image file

I have a 3TB WD Green HDD that failed. I bought two WD Red 3TB HDD + Synology DS215j NAS. Before installing NAS in RAID1, I want to use the WD Reds to recover the data from the 3TB WD Green HDD (one ...
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Splitting ddrescue output image into 2 files

My ext4 disk crashed and I'm using ddrescue to try to rescue it. However the crashed disk is 3tb, and I only have another 3tb drive for the image file. I assumed that this image file will be too big ...
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101 views

unzip a file and pipe to “ddrescue” command

I have a zipped image file, and need use "ddrescue" command instead "dd" to do something like this: unzip -p ubuntuXXXX.img.zip | sudo dd bs=2M of=/dev/sdb But "ddrescue" needs the image file as ...
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ddrescue recovering 0B but drive appears in device manager. Is it failing to connect?

I guess that this is a variant on a previous question "Is this ddrescue command doing anything?" Apologies for going over similar ground. I have a failing 2TB Seagate Barracuda drive which came from ...
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How to estimate loops/time for completion of GNU ddrescue (1.18.1) using current status?

Background/Context: I am currently running GNU ddrescue 1.18.1 to recover data from a USB that experienced a cable disconnect while I was writing a virtual disk image onto the disk2s1 partition. ...
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Resetting MMC controller without physically removing the card?

I'm trying to rescue data from an SDHC card using ddrescue: while true ; do ddrescue -d /dev/mmcblk0p1 mmc.img mmc.log ; done The controller, I'm not sure if it's the one on the card or the one in ...
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49 views

Why my rescued PDFs forms are empty?

First, I'm no expert, so don't assume I know much about data recovery. I'm using ddrescue and photorec to try to rescue files from a USB stick. It's a 32GB stick that has no more partition information ...
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411 views

Recovering broken USB drive: ddrescue disk to disk vs disk to image?

I am a bit confused about few things and I hope someone could clear this up for me. Is there any particular difference in disk to disk vs disk to image file approach? I executed following code to ...
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174 views

From a sparse file to a block device

I have a system image sparse file which actual size is only a few MBs but the "apparent size" is about 1GB. I'm trying to write it to a block device efficiently (without the holes). Here are some ...
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How to prevent FreeBSD from disconnecting a drive device?

While accessing a drive with high error rates (as, for example, here for opensuse) in FreeBSD, the system eventually disconnects the drive and it disappears from /dev. This makes it impossible to run ...
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108 views

Speed run through DVD with ddrescue

I'm using ddrescue to get data from damaged DVDs. If DVDs are badly damaged, the CDROM drive really struggles to read at all, and can spend 10 seconds continuously readjusting the beam arm or ...
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Can I find out if a given ext4 block is in the inode table, and if so, can I pick it out of a journal with no header by hand?

So en route from my old laptop to a new one my old laptop's hard drive got some physical damage. badblocks reports 64 bad sectors. I had a two-month-old Ubuntu GNOME setup with a split / and /home ...
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Drive disappears from dev during ddrescue copy or testdisk recovery

I have been trying to recover data from a Seagate 7200.11 1.5TB drive (2 ext4 partitions_ for 3 days now, predominantly with ddrescue and testdisk, but because of some critical error on the disk ...
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202 views

What is the correct syntax for cloning a ntfs partition to a sparse file on another ntfs drive?

I have tried ddrescue -v -v -S /dev/sda2 /media/mint/otherhdd/img /media/mint/otherhdd/log and ddrescue -v -v -d -S /dev/sda2 /media/mint/otherhdd/img /media/mint/otherhdd/log but it does not work ...
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7k views

Is this ddrescue command doing anything?

In the course of trying to recover data from a failing hard drive, I am running the command ddrescue. The command has been running for 9 days, and I thought from the sound of disk activity that maybe ...
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1answer
349 views

ddrescue prohibitively slow because of I/O timeouts?

On Ubuntu, my disk gave its SMART notification so I immediately tried to copy files to another disk. That failed. So now I'm trying ddrescue (partition to partition). It is running ridiculously ...
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Resuming ddrescue always restarts at first retry?

I'm using ddrescue to make an image of a faulty harddrive. I followed a tutorial that used the -r3 and logfile option. After a few hours, the tool made one pass and tried to read the bad sectors on ...
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What are some suggestions for using hdiutil (or other tools) to assist in recovery of files from dmg image?

Background I am attempting to recover information from a USB using GNU ddrescue 1.18.1. I have completed the rescue operation output from the /dev/disk2s2 partition to a disk image file on a ...
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94 views

Read files after running ddrescue

I have run ddrescue on a hard disk, and got all data (2 partition) to another disk named part1.img and part2.img. How to proceed to read (list) the files in part2.img? I use fedora 14, 32 bit
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ddrescue extremely slow on USB hard drive

I'm recovering the HDD from my laptop that died (wouldn't boot up at all, Disk Utility reported that there were no problems, but wouldn't mount the disk). I've hooked up the HDD through the USB ...
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What rescue disk (rescue CD/DVD) to recover data from failed HDD would you recommend for first time user?

What rescue disk (rescue CD/DVD) would you recommend for an user which unfortunately needs to rescue data from a bad disk (filesystems does not mount when using LiveCD, though fdisk looks O.K.) for a ...
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1k views

Hard disk drive disappeared

Yesterday I performed a hard-reset while Linux was booting. This led to a hard issue with the HDD (UNC while recovering journal). I had to use ddrescue instead of dd because dd crashed on I/O error. ...
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Migrate Ubuntu to bigger HDD

I have a multi-boot system and want to push my Ubuntu installation to a bigger partition on the same hdd, because I want the system to have more memory available. What I know so far is I can clone ...
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990 views

How can I merge two ddrescue images?

I have two ddrescue images created from contiguous recovery attempts of the same media. The two images are the same size but have complementary data: $ od part-one/ddrescue_image --skip-bytes ...
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How do I resize a disk image device?

I'm trying to reduce the size of a backup drive image. Original disk had these partitions: Model: ST916082 1A (scsi) Disk /dev/sde: 160GB Sector size (logical/physical): 512B/512B Partition Table: ...
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How to split a ddrescue disk image and how to use it again?

I have a 500GB external HDD that I need to rescue the contents of. Unfortunately I only have two 400GB partitions to save the contents to. Can I split the disk image as: ~$ cd /mnt/part1/Recovery/ ...