Questions tagged [ddrescue]

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

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GNU ddrescue to copy directories or folders from hard disk

Debian 9 (Stretch) laptop, and attached external hard disk in enclosure. How to use GNU ddrescue to copy folders or files from failed hard disk? (not the whole disk image). For example, /home ...
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How can I rescue broken data on an USB stick when ddrescue and safecopy do not find any errors on the drive?

After a friend wanted to copy pictures onto my 8 GB USB stick all data is corrupted. The USB stick was mainly used on Windows before. Also my friend used Windows to copy the pictures. Maybe he ...
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Will ddrescue continue from the log if I start using reverse (-R)?

I have used this with ddrescue sudo ddrescue -d -n /dev/sdg1 /media/ubuntu/lagring/deive.img /media/ubuntu/lagring/deive.log But it stops att 27.40% and starts for a while when I restart but then ...
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DDrescue: Corrupted file system after doing ddrescue

I did the standard DDrescue -f or something with 0 bad sectors on a drive that i accidentally used dd on /dev/sda1 and /dev/sda and bricked both of them. If i do mount /dev/sdb /mnt i get: mount: /mnt:...
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Follow up questions for using ddrescue with a USB enclosure

I was unable to recover my other account where I originally asked a question, so I'm hoping it's ok that I ask some follow up questions here I'm looking to use ddrescue to clone a failing drive that I ...
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ddrescue with USB Enclosure

I'm about to start a recovery with ddrescue and was wondering if I'm on the right path with these steps. I'm planning to: boot via Ubuntu live USB and use ddrescue disable automount in Ubuntu connect ...
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Can't resume drive recovery dd rescue v2.1.0

When I look up how to resume a drive recovery, I get told to run it again using the same input, output, and mapfile. But when I try it on DDRescue_GUI, it tells me "File already exists. Do you ...
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ddrescue, range in multiples of bytes

When using ddrescue, is it possible to only specify the first 25Gio? I see that I can use the -i parameter with block sizes, but can this be specified with Gio directly?;)
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ddrescue status is there any hope?

I have an external hard drive of 1Tb which stopped working. I'm trying to recover the information using ddrescue but I don't see anything been recovered. I'm doing the copy from the external ...
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ddrescue said most of sectors are good but I only got 20% files restored

One of my hdd broke down and I tried to use ddrescue to make an image and rescue my files. sudo ddrescue -d -r2 /dev/sda4 ~/tmp/test.img ~/test.logfile (I don't have enough space on my linux laptop, ...
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ddrescue: error in mapfile

I'm trying to recover a damaged partition on a damage hard disk thanks to gnu ddrescue. I followed ubuntu tuto to do so and let it run all night long, but the 3rd and 4rt commands fail: see the logs ...
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Interpreting dmesg log wrt non-mountable USB flash drive

I have a USB flash drive which I can no longer mount. demsg shows the following output (shortened): [ 1200.221030] scsi host7: usb-storage 1-9:1.0 [ 1200.221194] usbcore: registered new interface ...
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How to install ddrescue on Chrome OS via crosh or terminal?

I see that dd is installed in Chrome OS. I can access it both from crosh and the terminal. ddrescue is not installed. There is no apt-get command. How do I install ddrescue with either crosh or ...
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Script/Command to copy -intact- files w/ directory structure following GNU ddrescue

I made a clone of a failing hard disk using GNU ddrescue. Many of the files are okay, and many are broken. I can mount the clone, with its three partitions, in Linux. I need a script or command that ...
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ddrescue: 0% rescued on audio CD with 1 track that skips

I'm trying to get some lightly scratched albums (audio CDs) onto my computer via ddrescue. I ran the program on one disc with one track that has skipping problems, and it rescued 0%. The .iso was ...
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Need solution to recover disk, can't mount a ddrescue partition image

I used ddrescue to build out a 910G disk partition (sdh4) from a 1Tb disk. The disk looks like this. Warning: ignoring extra data in partition table 5 Warning: ignoring extra data in partition table ...
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/boot /home structure needs cleaning. I cannot access to those folders

After a night leaving ddrescue running to clone a external disk to another external disk and creating the log file in my internal hard disk, I got up and the laptop was stuck so i restarted it. When ...
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ddrescue cloning disk to disk. I cannot see anything in the new disk why?

I have a failing disk 1TB which does a bit of noise so I decide to use ddrescue to clone disk to disk the failing disk into a new WD 1TB. I was expecting to see information in the new disk while ...
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Trying to save a 2012 macbook pro failing disk with ddrescue

I have a Macintosh HD disk that failed suddenly (system would not boot anymore - diskutil complained about a problem with the B-tree. Tried various diskutil commands in the past without success) which ...
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164 views

ddrescue Understand

sorry about my English... I have lost dates on my External hard disk with dd (I have on my External hard disk with ext4 format and have only videos and some Files), now to try the dates from my hard ...
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SD card appears and dissapear after inserting it

I have a 16GB Kingston SDHC from a Canon SX40 that seems to be corrupted or has a hardware failure. Camera shows only a few photos and videos (and something that camera says it can't read). But there'...
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ddrescue: Unaligned read error. Is sector size correct?

I'm trying to use GNU ddrescue to recover raw data from a failing SSD. System is Debian Stretch. Thus far, I have this info out of it: dmesg [Sun Sep 8 15:04:20 2019] sd 7:0:0:0: [sdd] 468862128 ...
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ddrescue to larger drive

I have a 2tb external hard drive with a ext3 filesystem on the entire drive, so no partitions. I suppose this means there is also no partition table? This drive is somewhat broken, as copying some ...
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DDRESCUE - How to re-run first pass (don't do reverse yet)?

I ran ddrescue for a few days, and recovered about 60G. It had slowed to a crawl, and had an ipos of about 90M. I started again, adding -a100000, and it got another 35G in only 3 hours. It started the ...
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What is the purpose of the -t (--truncate) option of ddrescue?

When specifying an output file without specifying a logfile, the output file will be truncated anyway. How exactly is using ddrescue -t /dev/devicename outfile functionally different from ordinarily ...
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gddrescue slow transfer, but no bad sectors [closed]

I recently noticed my 2ndary internal HDD was having issues when I wanted to back up information to my external HDD. 1.4 TB out of the 2TB was being used. My transfers rates were plummeting to 0 and ...
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399 views

How can gnu_ddrescue be resumed to wipe a hard disk? [closed]

Hard drives (non-SSD) are generally wiped with the command dd if=/dev/urandom of=/dev/sdX conv=fsync status=progress. Since power outages do occur, this lends to restarting the wipe process multiple ...
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217 views

Usage ddrescue with -d option?

I am learning to use ddrescue and I would like to know what the -d (direct) option is for and in what scenarios it is recommended to use.
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Datarescue with ddrescue location of files

I am recovering a 2TB harddisk with one NTFS partition with ddrescue. Only 300GB of the 2TB are used (mainly photos). My problem is that I have not 2TB availbable on the rescue pc. Can I assume that ...
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257 views

SD card img created with dd is all zeros [closed]

A computer illiterate family member asked me to recover photos from an SD card she used in her camera. She went to fetch them from her computer when it informed her that the device needed to be ...
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Generate gddrescue log file from badblocks list?

I have a list of badblocks. How do I generate a gddrescue mapfile/logfile from it? Assuming that the sector size is known. This is the reverse way of Generating dead LBA list from gddrescue mapfile/...
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Unreadable block in multiblock reading on dd / ddrescue: How does it handle it?

Let's say that I set the block size of dd or ddrescue to 256K. A sector of flash drives usually has 512 bytes, a sector on optical data discs has 2048 bytes. Let's assume that in the next 256 KB, ...
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Generating dead LBA list from gddrescue mapfile/logfile?

I ultimately would like to know which files in images generated by (g)ddrescue are affected by damage. gddrescue (command ddrescue) is a tool for recovering data from damaged media. When specifying ...
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Can dvdisaster recover optical discs better than gddrescue?

gddrescue is more universal. But both tools are just limited by hardware restrictions. If a CD's sector is unreadable, the drive usually refuses to let the computer know about the subcode. For ...
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Batch processing a ddrescue mapfile with debugfs

I have a mapfile produced by ddrescue which lists 418 bad sectors where each line looks like this (the minus indicates a bad block): Position Size 0x1CC7C68000 0x00001000 - By converting the ...
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Get contents of ddrescue image file

I have a failed harddrive with around 400 GB of data, of which approximately 50 GB need to be recovered. All the data is located in a specific directory (/Fotos2018/). The hard drive is a WD My ...
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Why is ddrescue slow when it could be faster on error free areas?

This question addresses the first pass of ddrescue on the device to be rescued. I had to rescue a 1.5TB hard disk. The command I used is: # ddrescue /dev/sdc1 my-part-img my-part-map When the ...
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ddrescue .NTFS file can't open file

I have just rescued an old damaged HDD to my 8TB drive and I've got 1 .IMG file. I then took the 8TB drive to my work Windows 10 machine and used 7-zip to extract the file. Then I got 2 .NTFS files ...
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Using gdisk on drive with valid MBR and corrupt GPT

All: I ran ddrescue from a 1.5 TB input (corrupted) Windows external drive that was formatted NTFS to a 8 TB (uncorrupted) Western digital external drive that was formatted ext4. The 8 TB drive was ...
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In ddrescue, should the target drive be formatted the same way as the damaged drive?

Friends: I have 3 brief questions about ddrescue. This is the operation that I want to run: sudo ddrescue -f -n -v -v -v -v /dev/sdi /dev/sdh RescueHD10.log For me, the output drive "/dev/sdh", is ...
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ddrescue: How to retry for 1 bad block after all other data is safely stored?

I used ddrescue yesterday hopefully to retrieve 1:1 copy and stored it as an image on a new drive. Suppose I read backwards, because I knew, that there is a bad cluster at the beginning of the failing ...
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Linux AHCI/ATA read errors not reported

After a recent OS upgrade (to current Tumbleweed, Linux Kernel 4.16.0 from April 4th), when reading from a faulty hard disk or from damaged/scratched DVDs, I don't get anymore read errors in the ...
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How to set ddrescue image sector size?

I have ddrescue image and want to recover data from it. But the image is taking wrong sector size it should take 4096 and the partitions are btrfs partitions. How to change the sector size? $sudo ...
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Can't mount image created with ddrescue (SFS partition)

I am trying to recover data from a HDD. For this purpose I am using Knoppix 8.1 on a DVD. Running sudo fdisk -l gives me the following results for the specified HDD: Gerät Boot Anfang ...
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use gddrescue to clone device into multiple image files

I try to rescue data from my 1TB external drive using ddrescue because I accidentally deleted everything from it. Practically I have to face exactly the same situation like posted here: How to split a ...
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782 views

Hard drive unreadable

The 500GB Seagate ST9500420AS (D005SDM1) hard drive in my 2011 Dell XPS 15 crashed the other day and, although I had the most important data backed up, I would really like to save the rest of it. It ...
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save lost data by ddrescue

I have lost datas in a memory card. So, I decided to use ddrescue. Fine. But after running command sudo ddrescue -f -r3 /dev/sdb1 /dev/sda5 logfile, I lost all my data in /dev/sda5. I don't know why....
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dd, ddrescue, dd_rescue performance according to OS (Ubuntu, macOS)

I put this question: recover files from HSF+ USB External HD, test on CentOS 7 to diagnostic And this https://askubuntu.com/questions/955325/using-gpart-testdisk-to-recover-gpt-for-files-from-...
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Recovery of damaged DVD yielding “no medium found” error

I have a very strange case of DVD reading failure. It's a video DVD recorded a couple of years ago on a DVD-R disc. Two weeks ago our video DVD player would start having trouble reading parts of it. ...
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ddrescue - avoiding sectors that shut the controller down

I have a problem with my SSD drive – it would appear that the controller started acting up. What happens is that if requested to read specific sectors, it will completely shut down the access to disk. ...