Questions tagged [dd]
A common Unix program whose primary purpose is the low-level copying and conversion of raw data.
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Why does dd pause for 5 seconds, then continue for 20 seconds and then pause again?
I am creating a copy of a hard drive that has lost data on it so I can attempt to recover data from a copy of the disk and keep the original safe. I am using dd on a Mac and it worked for other drives ...
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Is it possible to migrate a bootable NVMe SSD to a different one via a dd image?
I have a Linux Mint installation on a M.2 NVMe SSD in a laptop.
I'd like to move this installation to a new laptop with a fresh SSD.
Is it possible to create an image using dd on the old laptop and dd ...
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Can I force Linux to write data at the start of a file system?
TLDR;
Is there a command to force Linux to write a file (for example a PDF file, MP3, anything really) at the start of a file system ? I don't thing that # dd does the trick, because the inode table ...
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What happens to the free space of HDD2 if dd is used to write the smaller device HDD1, to HDD2?
What happens to the space left on sdb in this case? I assume dd will write the data at the beginning, replace the partition table, and the free space will be untouched (not usable).
sda = 10 GB
sdb = ...
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1
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GPT Table repair after dd disc clone
I used dd to clone a 500gb Hard Drive to a 256gb SSD before doing this I edited the partitions so that the last 280gb (roughly) was unallocated using GParted.
Eventually dd ran out of room at 240gb, ...
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Steam deck ssd clone using dd, while following guide, ran out of battery. How to run command again?
So I was running a dd command to clone the ssd of my steam deck to a new one I have connected externally with an adapter enclosure. Problem is like a dummy I didn’t check my battery before starting ...
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1
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Can a dd command destroy the input file?
Assuming that I have the correct input file and the correct output file in the dd command. Is there a risk that if something change in the input file during the process it could corrupt the input file ...
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Create a new hard drive for wdmycloud on larger disk
I am trying to follow the instruction wich can be found here I have followed all the instruction in the file "Replace HDD - English.txt" I have a new hard drive with 6therabyte my old hard ...
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dd + gz = Even Worse /// Mount Valid Partition of Whole-Disk dd Image
I've got a 250G backup of a whole disk via dd, which was then piped to gz, thanks to the advice of one of my -genius- friends.
Looks like the EFI boot partition was corrupted (pretty sure it's an ...
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1
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341
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How does “dd” determine where to start copying disk blocks?
Say we have a hard drive disk and the blocks are numbered as: 0, 1, 2, 3, 4, etc…
I assume that this command will read the disk blocks from block 0 and in sequence (1, 2, 3, 4…) right?
sudo dd if=/dev/...
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How to implement the quota size which can be modified later in samba?
I want to give quotas for individual shares, such that I can also modify the quota size in future. I tried doing this using this https://superuser.com/a/976714 answer. Problem is file modified using ...
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1
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How to restore data after accidentally starting DD on a hard drive but stopping it before it went too far? [duplicate]
Today I've plugged new ssd into my PC and started an dd command for USB drive. It was too late as I recognized, that the drive letters moved around and I started flashing an ISO image over all my data....
0
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2
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How to copy files into specific offset of a harddisk?
Source harddisk: Size 500G. 210G of data. Used hexdump to check beyond 280G are all zeroes.
hexdump -C /dev/sdd2 --skip 280G --length 10G # all zeroes
Destination harddisk: Size 600G. Used hexdump ...
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LVM: Renaming LVs and PVs with vgimportclone on disk cloned with dd
Hello everybody out there using LVM,
To have an immediate backup disk to replace my main Ubuntu 18.04 hard drive (which uses LVM), I cloned the main hard drive with dd.
This resulted in a clone also ...
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0
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DD copy prematurely reports "no space left on device". Beyond hardware failure, what could have caused that?
I have an embedded device booting from SD card with 8GB internal flash (enumerating at /dev/mmcblk1). I used to be able to manipulate the flash just fine (as in, I know that it is actually 8GB and ...
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Is it safe to use `dd conv=sparse` to migrate my system to a new SSD?
Back when HDDs were dominant, it's common to use the dd command to migrate system disks. But that creates a problem with SSDs: unused space from the source disk will also be written once, with either ...
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2
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75
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How do I create a backup of my hard drive in small sections?
I have an old laptop with a 500Gb non-removable (soldered) hard drive. I am attempting to recover some data from the drive. After some reading, I've discovered that I should create a copy of the drive ...
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0
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594
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The most complete backup of /dev/sdX with dd, tar, gz, xz
What is the most complete way to backup/restore entire /dev/sdX (to/from a file) including device partition table and partition flags, all possible metadata, owners, file permissions, ACLs, creation/...
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lsblk doesn't show mmcblk0, mmcblk2 exists
I am trying to install devsus on an ASUS C201 laptop. I have successfully installed on an external USB, but am trying to install to the internal laptop memory. The instructions direct me to dd the ...
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0
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145
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Using a Squashfs to DD onto a partition to repair the OS
I have a very strict system with the bare minimum applications on for security reasons since I work with medical data.
Sometimes the laptops we use messup for one reason or another, won't boot, can't ...
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1
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585
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Clone windows hard disk and resize ntfs partitions from linux
I have a 500gb hard disk with two main NTFS partitions, one for a Windows OS and the other for data for use by that OS as well as the boot partition at the beginning of the disk. The data partition is ...
- 101
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How to get SHA1 of first 4096 bytes of an mp4 file or stream?
I am trying to use command line tools to match the hash value that Plex.app computes for movie files (apparently, it's an SHA1 hash of the first block (4k) of a movie instead of the entire movie).
I ...
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error of "You don't currently have permission to access this folder" from osfmount when opening \users\user from a raw file produced by dd
I'm getting an error of "You don't currently have permission to access this folder" from osfmount when opening \users\user(or whatever user profile folder), from a raw file produced by dd (...
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0
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dd fails to restore partition
Being my own sysadmin for 24 years have never had to do a dd partition level restore of a backup - now my first attempt to so fails. Everything I've read implies this should be straight-forward, but ...
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0
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bootable backup of ubuntu
I have Ubuntu installed on a single 1TB drive. What I want to do is a full backup of the system. I know I can use tar/gzip or rsync for most of the data, but I'm not sure what exactly do I need to do ...
- 121
0
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0
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846
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Cloning an SD card onto a larger SD card - exFAT
I'm using Ubuntu 18.04, and attempting to clone the SD card (128G) from my Android phone to a larger one (256G) for more capacity, without losing the file structure referencing my phone apps use.
I ...
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2
answers
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Rufus Linux DD mode to Flash drive Normalization
NEED help,
My primary language is not English, so here it goes:
I already destroyed one of my flash drive Transcend Jetflash 790 32GB.
GOT a replacement from the warranty.
I'm trying to dual boot ...
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1
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Use Rufus to create an image of a partition + restore this partition to disk on Windows
Can we use Rufus to save a local disk partition into an .img image file? Basically the Windows equivalent of:
dd if=/dev/sda4 of=output.img
Also can we use Rufus to write an image, not to a whole USB ...
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From VirtualBox VM (.vdi file) to a USB bootable ISO image
I have set up a virtual machine with Xubuntu Linux in VirtualBox.
The disk is 4.5 GB a .vdi file.
How can I make an IMG or ISO file from this, such that I can then write it into a bootable USB flash ...
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3
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1
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145
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Odd behavior by 'du' with `dd` on a BTRFS disk showing 0 filesize.. Anyone got some clues or thoughts around it?
Been tinkering with btrfs with consideration of moving from ext4 to that.
However, when wanting to compare R/W speeds, I seem to have come across an (to me at least) unusual behavior by du on the ...
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dd: error writing to output file no more disk space, Is this normal?
I have a 4 disk NAS configured as a raid 5 but unfortunately the raid recently became unrecognisable, but the NAS boots fine otherwise. I'm in the process of cloning disks so raid recovery can be ...
0
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0
answers
221
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How to correctly view a restored DD (image-->partition) (Clonezilla) from an APFS filesystem?
Currently the partition which contains the restored image is unreadable by Windows..
So I attach that partition (inside the disk via USB) to a Mac computer and it also DOES NOT show up ..
What am I ...
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Why my images created with DD have different sizes
I am working on cloning my Raspberry PI microSD cards in order restore then quickly.
I use DD linux tool with SSH because they are difficult to access physically.
From my computer, my command is : ssh ...
3
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1
answer
713
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How to read tmpfs as a block device in linux?
A typical linux machine mounts a tmpfs to store temporary files:
$ df
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 953M 702M 203M 78% /
tmpfs 1.5G ...
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Can a broken cdrom drive cause I/O errors in programs like dd, ddrescue, etc.?
Can a broken cdrom drive cause I/O errors in programs like dd, ddrescue, etc. even if the disc itself doesn't contain bad sectors?
Note that I'm interested in purely technical, factual answers, not ...
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What does the dd command do?
If I make a copy with the "dd" command from a block device say 8 GB to a 16 GB block device, the content of the first device is copied to the second device until it is full? (that is, until ...
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Searching for strings in a dd image, extracting data from it
I am trying to recover the contents of a text file that became corrupt following a power outage. The file size is still correct (14 MB), but the text in the lower half of it has been replaced by ...
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0
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remove MBR of corrupted disk with 0 bytes
My Problem is that I have a external SSD drive which got corrupted and shows:
Disk /dev/sdc: 0 sectors, 0 bytes
And
Problem reading disk in BasicMBRData::ReadMBRData()!
Warning! Read error 22; ...
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backup then restore when drive sizes differ
I would like to backup a Windows 10 machine ( 256gb internal drive ) onto an external SSD drive ( 1 tb ) ... however to do this backup if I boot up using a Ubuntu LiveUSB memory stick then issue the ...
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DD image with no empty space of the volume
I want to create a DD image of a Volume of OSX from mac with none of the empty space, only the used space with data on it , to reduce the size of he img/dmg/raw file.
I've tries multiple software but ...
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2
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Fastest way on Windows to copy 38GB of files to 50 USB drives
If I were doing this, on linux or Mac, I would
make an NTFS RAM drive
mount it
copy the 38GB folder hierarchy to it
save the RAM drive to disk
insert a USB drive
determine the name of the raw device ...
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pipe-lining using wget or curl on linux
I would like to know how can I download a file from the internet using wget and/or curl by separating the file into even segments and downloading the file using 8 or 16 direct links, substantially ...
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Windows dd Command: Access is Denied Error
I need to create a .dd image of one of my drive in windows, For this I chose dd utility. However it is generating aforementioned error while creating image. I have opened command line as Administrator....
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Cannot mount new hard disk after using dd command to copy old hard disk
I wanted to create a backup copy of my external HDD (/dev/sda) to new HDD (/dev/sdb).
Initially, old HDD had one ext4 partition and new HDD had one exfat partition.
I did the following.
$ sudo dd if=/...
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3
answers
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Restoring the partition table and a fsarchiver backup from a dead disk to a new one
My openmediavault server's ssd disk died, and I replaced it with a new one (different brand, same capacity). Now I wanted to restore my last backup made with fsarchiver via the omv backup plugin, and ...
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Copying raw partition sequentially, in chunks, with error recovery
Normally if I want to copy a raw partition /dev/sdaX (with i/o errors when reading), I would just go with ddrescue <src> <dst>.
The case here is that I'd like to be able to copy this ...
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2
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438
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Why are read / write sequential and not parallel?
I copy data from one disc to other
sudo dd status=progress if=/dev/sdc of=/dev/sdd ibs=1G obs=1G
But I notice that read/write are done sequential:
Is there a way to make it parallel to speed up ...
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dd without any options
What does dd command do when ran without any options ?
[hannah@lenovo ~]$ dd
^C0+0 records in
0+0 records out
0 bytes copied, 7.71982 s, 0.0 kB/s
Does it delete any files or it's nothing to worry ...
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103
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I accidentally cloned my 16GB SD card to my 256 GB pendrive using dd. Is there any way to retrieve back my pendrive?
I have a 16GB SD card, which when I connect to my computer, gives cant read superblock error (in Ubuntu). After searching on internet, I saw some solutions using testdisk tool and decided to try it ...
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1
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Linux - accidentally used dd on a LUKS encrypted drive, is there a way to recover?
I accidentally ran dd bs=4M if=image.iso of=/dev/sda oflag=sync when creating a bootable drive instead of targeting the USB stick.
I am fairly certain most of the files would be fine - the iso is only ...
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