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Questions tagged [ddrescue]

ddrescue is a data recovery tool that copies data from one file or block device to another, trying to rescue the good parts first in case of read errors.

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How can I attempt to read bad sectors from the end of the disk, using ddrescue?

How can I attempt to read bad sectors from the end of the disk, using ddrescue? I have dynamic volumes and the LDR is kept at the end of the disk, unlike MBR. I remember that I've tried --reverse but ...
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Windows 10, bad blocks, ddrescued to new disk using Linux, boot fails

My wife's Windows 10 machine (a Dell Inspiron 530) had an old 500G SATA disk in it. It developed bad blocks, so rather than wait for it to die and have to buy a new copy of Windows 10 (it was upgraded ...
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3answers
2k views

Reading bad blocks from hard disk too slow in Linux

I'm trying to recover data from an old 320G hard drive (full of bad sectors) to a new one. I found that ddrescue is a good tool for this task due to it's smart algorithm. I have already done this once ...
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2answers
3k views

In which case should I prefer dd over GNU ddrescue?

As far as I can see, comparing dd with ddrescue can be concluded saying that ddrescue is far better at rescuing data from broken data sources. dd does not have this ability. dd_rescue vs dcfldd vs dd ...
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1answer
17 views

ddrescue reset usb device on read timeout

I have a damaged external usb hdd. When i connect the device to the pc i can access the file system for round about a minute. After that period the disk keeps spinning but every io operation times out....
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2answers
125 views

Can I recover a single partition with ddrescue?

I have a failed hdd (seagate 1Tb) with bad sector. I want to make an image of it with ddrescue. The problem is that I don't have a 1tb hdd to put the image on. The files that I have to rescue are ...
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1answer
134 views

How to speed up ddrescue

I am trying to backup my failing external USB HDD Maxtor M3 4TB using ddrescue. In the beginning, I was getting around 300kB/s so I ripped the external box and connected the drive directly via SATA ...
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1answer
419 views

ddrescue from drive intermittantly cutting out, ways to automate power cycling via software?

Have a failed Windows/NTFS drive. I was able to connect to another PC via USB-to-IDE cable and recover most of the drive with a Knoppix 7.2 LiveUSB and ddrescue/ddrutitliy. I've recovered most ...
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8answers
35k views

Is there any way to speed up ddrescue?

I had a 500GB drive HDD crash about 5 days ago. I used ddrescue on the important partition a few days ago, and it's been on "Trimming failed blocks" for almost 2 days now. Original command: ddrescue ...
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19 views

Why does VMware stop writing data read using ddrescue?

I'm using VMware Workstation 15 Pro to run a VM containing some pretty current rescue-Linux to rescue data from some broken USB-HDD using ddrescue. That starts working fine for some GBs of data, then ...
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1answer
343 views

How to rescue a multi-session CD?

I have a multi-session CD whose contents I want to copy to a hard drive. The CD is around 20 years old and it has several parts presenting read issues, so it is a potential candidate for ddrescue. ...
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How to recover data from unallocated drive? [duplicate]

The 750GB hard drive in my Windows 10 laptop has died and I'm planning out my recovery strategy with the Parted Magic CD. The drive is currently showing up as "unallocated" in GParted. Here are the ...
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1answer
80 views

How to merge ONLY mapfiles of `ddrescue`? (only mapfile was mistyped)

My system is Manjaro (Arch) Linux. I have GNU ddrescue v1.23-1 (recently installed). When resuming ddrescue, I mistyped the mapfile. Now I have one image and two logfiles. On Day 1, I rescued the ...
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45 views

ddrescue stuck, Error Splicing DVD file on Linux, but not on Windows

I have couple of old scratched DVDs which I wanted to rescue using ddrescue. The problem is it shows "error splicing file" on copying files manually using PartedMagic or Ubuntu, also ddrescue gets ...
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3answers
110 views

Is it safe to use multiple different `--input-position` with ddrescue?

I need to rescue data from some 2 TB large hard-drive and am doing so in some Live-Linux in some VM, where the problematic hard-drive is connected to using USB 3 and the VM provides a virtual disk of ...
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2answers
1k views

Which will be the size of a ddrescue image?

I'm trying to fully understand ddrescue before using it to decide which is the best strategy to recover the most from a maybe damaged HDD. Chances are the hardware is not damaged but before trying any ...
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1answer
161 views

Can't resize NTFS partition

I'm cloning an old 1TB drive to a new 2TB drive. I've successfully managed to clone it, using ddrescue and SystemRescueCD, and can now boot into Windows on my new 2TB drive. However, the drive now has ...
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Using different versions of ddrescue “together”

I have a 2TB Seagate Barracuda 2.5 inch drive which is starting to fail (SMART is yellow and showing many pending sector reallocations, copying a 70GB disk image I had on it failed, bla bla). I ...
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4answers
3k views

ddrescue attempt ends with drive disappearing from /dev

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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0answers
200 views

GNU ddrescue, request help on how to proceed for advanced passes

Hello I'm doing an image of an ntfs disk with the GNU utility ddrescue, I made a first pass with the -n option which resulted in an amount of non-scrapped data, a bad-sector amount, a number of bad-...
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29 views

Hard disk periodically hangs with large amounts of I/O

To illustrate the problem: right now I'm backing up a NTFS partition with ddrescue. The application will run for several minutes (2-3 GB) and then apparently hang. No errors are reported and it never ...
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1answer
118 views

Gddrescue asks for a mapfile but refuses to create one

I'm using Example 3 from gddrescue's documentation here to zero-write a disk and force pending bad sectors on it to be reallocated. The same documentation states elsewhere that: If mapfile ...
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88 views

Trying to restore gnu-ddrescue .img file to new HDD

I tried to do a routine Win7 x64 SSD backup using Clonezilla. Tried a couple of times but it failed both times reporting bad sectors. I ran checkdisk and a few other programs but they found no ...
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3answers
1k views

Hard drive docking station usable for hard drive recovery?

I installed Linux on an old computer along with ddrescue. Instead of placing each broken hard drive in the internal bay, can I use an external docking station with ddrescue? I'm hesitant to buy a ...
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1answer
535 views

ddrescue: Retry failed blocks after first run

I backed up a failing harddrive with ddrescue. The command I used was # ddrescue -vv -d -J /dev/sda /mnt/rescue/winxp.img winxp.map The program completed with around 60 errors. I wanted to retry ...
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83 views

Recovery of files from a Windows failing drive

A 1TB NTFS-formatted disk on my Windows 10 machine started crapping out. Following advice in other questions, I downloaded a System Rescue CD ISO, booted from it and ran ddrescue as suggested here to ...
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5answers
2k views

Why can't ddrescue just recover blocks used by the filesystem?

It seems that ddrescue tries to recover all blocks on a disk or partition, even ones that don't contain files. Wouldn't it be possible for it to find out which blocks actually hold files by looking at ...
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0answers
3k views

Can't mount image of NTFS partition created by ddrescue

I've used ddrescue successfully in the past but I'm having no luck this time. Usually, I make an image of the partition, run a fsck or whatever else on the image to fix file system errors, mount it ...
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0answers
179 views

Can't mount a Windows 10 drive for ddrescue

I'm trying to run ddrescue for a drive containing a Windows 10 installation. I have shutdown the operating system with shutdown /t /s 0 to circumvent the hydrid shutdown issue. blkid shows the ...
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1answer
118 views

Can't write back a ddrescue(d) image to HD, ends up blank

I have an image file of a faulty harddrive created with ddrescue on Linux. The harddrive is 750GB, if I remember correctly, only about 30MB could not be saved. I do have some other faulty HDs and can'...
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1answer
172 views

gddrescue --fill-mode=+ with a map file of 0x00000000 0x608336000 + has left the partition table intact?

I first ran this command: ddrescue --force /dev/sda /dev/null HGST_RMA.map I just wanted a map file for blanking (therefore /dev/null). And this is what my .map file looks like before I interrupted ...
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2answers
609 views

Can I mount read-only a partition image that is being written into by ddrescue?

I'm recovering a damaged drive. The first 2 passes are done, but I want to rescue more data, while being able to browse the already closed partition image, while it is being filled up with new data ...
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1answer
118 views

GNU ddrescue “Rescued” is larger than the HDD

I am using ddrescue to recover data from a failing drive. The drive is being read as 596.2 GB via the lsblk command. The thing that is confusing me is that ddrescue is showing that it has, so far, ...
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0answers
45 views

Any way to undelete accidentally removed partitions? [closed]

At the moment I have Knoppix 8.1 inside a DVD and a 16GB USB stick if I must download another rescue OS, and 2TB external hard disk I bought yesterday I am aware of the size of the partition which is ...
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1answer
164 views

How to explore a ddrescue image manually / interactively?

I have a ddrescue image containing data from a Btrfs partition whose first GBs were overwritten. Therefore, the filesystem cannot be mounted, so the files cannot be accessed through any filesystem as ...
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263 views

Correct command on 'gddrescue'

I'm using gnu ddrescue by Antonio. I have a broken, but not dead (checked by the photorec utility - it found and saved many files on it) a 1 terabyte usb-HDD and the goal is to create its RAW-file. ...
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2answers
1k views

ddrescue very slow, writing to NTFS – is it worth it to convert to Ext4 now?

Two days ago I began the recovery of a 1TB failing HDD which was handed out to me with the hope that I could salvage most of it for a cheap price. At first it behaved erratically, often being ...
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2answers
338 views

ddrescue, “size on disk” lower than total size, with possible impact on performance when writing to NTFS

The backstory is in my previous question and my own answer to it. At one moment I had two partial images created by ddrescue: one file on NTFS filesystem and the other on ext4. I had noticed quite ...
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1answer
409 views

DDRescue Log File Corrupt after 6 week recovery

I've been runnning DDRescue on a 3Tb drive for almost 2 months and I had recovered about 2.8Tb when the system crashed and the log file I was using came out corrupt. I was able to recover portion of ...
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1answer
116 views

Safely recover disk when I don't have enough free space to make an image and copy files out

I have a 2.7T hard drive that has been causing some problems lately, so I've bought a new 3.6T disk. The old drive contains about 2.4T of data (lots of files are hardlinked) in a single ext4 file ...
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1answer
293 views

DDrescue parallel operation

I’m using ddrescue to recover data from a Seagate Barracuda 3TB drive. The drive is failing, but so far every sector I try to read eventually returns the correct data, but it might take some probing (...
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1answer
712 views

Possible to recover using a partial ddrescue image?

I'm using GNU ddrescue to clone a failing 500GB disk and the image is currently sitting at 470GB. The problem is that read speed has decreased to only 8-32 KB/s so that remaining 30GB will take ...
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1answer
171 views

How do I use drive copy generated by ddrescue that shows no partitions, only unallocated space?

I recently used ddrescue in Ubuntu to attempt recovering data from a failing HDD (details here). The process completed successfully with the following: GNU ddrescue 1.19 Press Ctrl-C to interrupt ...
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72 views

Recovering a striped volume

Is it possible to recover a striped volume (6 TB from two 3 TB disks) that has had all it's data removed with sudo rm -rf? Assuming no overwrites. As a last resort (I'm a student with very few ...
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1answer
791 views

Do I need to format/partition ddrescue destination drive?

I am trying to recover data from a failing hard drive using GNU ddrescue on Ubuntu. I used the following command: sudo ddrescue -f /dev/sda /dev/sdb [path to mapfile] So far it is working speedily ...
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151 views

How to find corrupted files on LUKS encrypted disks by searching for unencrypted content

I have a full disk encrypted Ubuntu 16.04 system running at home on a SSD which had uncorrectable media errors and so had to be replaced. So I used ddrescue to copy all partitions to a new SSD, and ...
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1answer
395 views

Merging 2 ddrescue output of the same drive efficiently

I am trying to rescue a partition in a failing 500GB hard drive at /dev/sdb using ddrescue to a second 1TB drive. The ddrescue command I use for first pass is: ddrescue -n /dev/sdb2 core.img core.log ...
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1answer
536 views

DDRescue - Did I do the wrong command which is causing it to take longer then expected

I am running the following command on a 500GB drive: ddrescue --force --direct /dev/sde2 /home/backups/sde2.img sde2_logfile.ddrescue However, the time has been almost 24hrs and all it has done so ...
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1answer
104 views

dd_resccue attempt yields empty .img file

I have a hard drive with a some data corruption and am attempting to recover the data with dd_rescue. I am running Ubuntu 10 running off a thumb drive drive (my primary boot disk is running Windows 7)....
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2answers
4k views

Mounting a complete disk image rescued by ddrescue

I've recovered a complete NTFS disk with ddrescue in Linux. The catch is I didn't just rescue the partition (sdX#) but complete disk (sdX) with partition table. It's really easy to mount disk ...