Questions tagged [dd]
dd is a common Unix program whose primary purpose is the low-level copying and conversion of raw data.
483
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Use of block size in dd and ddrescue
I have seen examples of using the dd and ddrescue command, and I see that instead of asking the user for the size of the block on their device, they recommend using bs=1M and I do not understand why.
...
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2
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Fastest way to migrate to a bigger SSD (18.04)
I've seen a few postings about migration with older Ubuntu versions.
What's the fastest way to migrate 120GB (80GB full) to a 1TB SSD under Ubuntu 18.04?
live duplicate or via image possible
how to ...
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1
answer
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dd-backup of corrupted disk
I used dd to create a imagefile of a partition of my external hdd. I used the 'conv=noerror,sync' option to skip readerrors and it did a full copy.
'sudo dd if=/dev/sdd of="/media/me/out/theimage....
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1
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Complete data transfer with dd - Is that possible?
I am planning to create a /home partition. The only problem is that my hard drive is MBR, not GPT, and I have used the maximum 4 partitions that are available (Windows 7, a NTFS partition for data, ...
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dd an internal partition to a single file onto an external USB drive
Description:
I would like to copy a whole data partition (~100 GB) from a computer to a single file on an external USB drive so that I can copy it back on a new empty data partition of an other ...
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1
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How do I restore important data for image.dd? Photorec will lose file names and will scatter the information
A few days ago I was in a middle of copying or cutting folders and data to my external hard drive and it was corrupted.
I have tried to locate the lost information on Test Disk but I have now lost it ...
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1
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lubuntu 18.10 x64 installed on USB stick clone to usb stick 2
Help!
Creating clone from a cosmic installed bootable USB stick;
I have a working running USB stick with lubuntu 18.10 cosmic on it. I installed the stick by a normal lubuntu 18.10 .iso.
Now I ...
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1
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Restoring Data from image.dd [duplicate]
A few days ago I was in a middle of copying or cutting folders and data to my external hard drive and it was corrupted.
I have tried to locate the lost information on Test Disk but I have now lost it ...
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0
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1
answer
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GPT PMBR size mismatch after dd clone - why it only happens sometimes
I have used dd command to clone disk A to disk B. However, in some cases (not always), after a successful clone, fdisk on disk B gives me:
GPT PMBR size mismatch (937703087 != 1000215215) will be ...
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1
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0
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How to recover data from NTFS partition after accidently running EXT4 dd on it?
I was trying to copy my EXT4 partition as backup and I accidentally putted my NTFS partition containing my data on the dd command.
Now my data is lost :(
I've tried testdisk but it wasn't able to ...
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1
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GRUB loads Ubuntu installation from wrong SSD
Since the original SSD of my Laptop (sdb) is relatively small (100GB) I recently installed another SSD (sda) with a larger capacity (500GB). My idea was to clone the old SSD (sdb) onto the new SSD (...
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0
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How to get back to command line from grub rescue after shutting down halfway through dd if=/dev/zero [duplicate]
I was intending to use dd to wipe my laptop's HD, but accidentally pressed enter with only
[dd if=/dev/zero/
without an of=... argument, then could not enter any further commands, so I cut the ...
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1
vote
1
answer
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What's Going Wrong Here (Erasing My Home Partition)
I'm using the DD command
sudo dd if=/dev/zero of=/dev/sda4 bs=10M
from a Xubuntu live USB. SDA4 is my Home partition, which has been wiped normally before attempting to use this command.
This is ...
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0
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1
answer
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How to mount a whole disk image formatted in UFS filesystem
I am trying to mount a raw disk image created by dd command from whole one disk. My disk has a UFS file system on its drives. mount command needs a special drive to mount. How can I do it?
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0
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DD command broke partition table Ubuntu
I have two exact same model and capacity hard drives with the first one having Ubuntu Server 16.04 (/dev/sda) on it and the second (/dev/sdb) having formerly been part of RAID configuration on ...
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0
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cc1: error: code model kernel does not support PIC mode
This is my simple drivers Makefile:
obj-m+=hello_world_module.o
KDIR=/lib/modules/$(shell uname -r)/build
all:
make -C $(KDIR) M=$(shell pwd) modules
clean:
make -C $(KDIR) M=$(shell pwd) ...
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2
answers
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dd doesn't work
I do
$ df -h
...
/dev/sdc1 1,5G 1,5G 0 100% /media/username/Ubuntu 17.04 amd64
$ umount /dev/sdc1
$ df -h
...
#sdc1 now not listed
$ sudo dd if=./memtest86-usb.img of=sdc
307200+0 ...
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2
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dd manpage is so vague, how to create disk image
I am booting a live disk Ubuntu and I want to back up my entire SSD (sdb) with all 3 partitions (sdb1, sdb2, sdb3) to an image file on an external hard disk.
This guide suggests this command:
dd if=/...
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0
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Cloning Windows 8.1 with Ubuntu dd
Will there be any problem/caveat when I have a hda disk with Windows 8.1 system and with a bootable flash disk I enter under Ubuntu system this command:
dd if=/dev/hda of=/dev/hdb bs=1M
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2
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0
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sha256sum of image on dvd doesn't match to original ISO
I tried to check sha256sum of ISO after it was burn on DVD I used this command and got result that differs from original ISO's check:
dd if=/dev/sr0 | sha256sum
Does it mean that it was written ...
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0
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Why does dcfldd always fail on cd-roms that also contain music?
Ive been working on digitizing my entire library of physical discs, using dcfldd to make disc image copies of every cd-rom & dvd Ive ever owned so I can take them off to the thrift store and save ...
2
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1
answer
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DD command is not working as intended
So i tried using this DD command to transfer my USB, ISO file og the Ubuntu download over to my SSD. I did this because i couldn't find my SSD but only my HDD before when i tried to install Ubuntu. As ...
1
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1
answer
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Set date and time from http header in router with curl or wget
This technique should be similar or the same as on Ubuntu; though the following code does not work on the router. One method is the following:
dateFromServer=$(curl -v --silent https://google.com/ 2&...
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use dd Cloning Tool and Ubuntu installed on usb for upgrade or downgrade Ubuntu
I upgraded from Ubuntu 16.04 to Ubuntu 18.04, made some wrong selections while upgrading, Can I use Ubuntu installed on usb stick (dd The Native Linux Cloning Tool) to upgrade or downgrade Ubuntu ?
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1
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clone physical partition to an image - which dd options should I use?
I want to convert a physical partition (Windows C:\ drive) into an image file with dd.
dd if=/dev/sda1 of=/path/to/W7.img (run from a live DVD which I start the original machine with)
is what I can ...
- 501
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2
answers
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How to backup entire disk for Ubuntu Server quickly and easily
I want to create an image of Ubuntu Server installation so that when I need to create a new server I can really quickly install the image on a new USB drive.
I was planning to use DD for this but my ...
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2
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how to create dynamic qcow2 image from Windows C:\ drive?
I want to convert a Windows 7 C:\ Drive from my previous laptop into a qcow2 image which I wan to use to create a KVM virtual machine from on a new (linux based) computer.
I guess the simplest way ...
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2
answers
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Run a linux partition on VirtualBox
On my computer, I had multiple partitions and operating systems.
/dev/sda1 -> recovery
/dev/sda2 -> linux
/dev/sda3 -> swap
/dev/sda4 -> windows
I made an image backup of the linux ...
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1
answer
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booting dd image on virtualbox
I have been through a lot of questions regarding backing up your data, most recommended method is Clonezilla live CD but that wont work for me due to the server being remotely hosted by a company so I ...
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2
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1
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Accidentally zeroed first 4kb of primary HDD
To start, this is similar but not the same to Accidentally did dd /dev/sda because I restarted my computer.
I was making a bootable usb, and when I went to clear the partitions of the usb, I did:
...
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3
votes
1
answer
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Mount dd image for my USB
I'm trying to mount a .dd image. I followed 2 methods without success ...
Method 1
1st step:
root@evilcode1:/root# blkid qassam.dd
qassam.dd: UUID="524F4B6665E82B4E" TYPE="ntfs"
2nd step:
I ran ...
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1
vote
0
answers
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Data remain on hard disk after dd command
After several experiments with Ubuntu mini, I have discovered something strange.
When I want to start a new installation, I boot the system to the Ubuntu mini image, I let it continue to the language ...
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7
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1
answer
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What is the 'bs' option in dd?
I've found conflicting information on the internet on whether the bs in a command like dd bs=512 if=/home/Downloads/ubuntu.iso of=/dev/sdb stands for "bytes per second" or "block size&...
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2
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Why unmount a partition before overwriting the disk?
How to create a bootable Ubuntu USB flash drive from terminal?
Why do guys here use umount first? I assume USB flash drive should be formatted first, so does umount format the disk, or just detach ...
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votes
2
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fallocate vs dd for swapfile?
I'm wondering what the difference is between creating a swapfile with
fallocate -l 1G /swapfile
and
dd if=/dev/zero of=/swapfile bs=1024 count=1024
both seem to work fine, but does one have an ...
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0
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1
answer
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Need to use dd, but no /dev/sd* [duplicate]
Using Beaglebone.
Need to run dd to backup an image and then restore it.
dd bs=64K if=/dev/sdX of=/dev/mmcblk1/myImage.img
But I don't see any sdX, where X is a number.
So, what should be the ...
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0
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How can I use dd to make a Windows 7 USB installer in Ubuntu? [duplicate]
Why didn't dd make a bootable Windows USB stick?
Has anyone tried to burn a Windows 7 USB installer in Ubuntu?
Usually I run dd to burn linux ISOs, and I thought it would work for Windows 7, but the ...
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1
answer
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How child process still running when i exit terminal window?
When I execute
dd if=/dev/zero of=/dev/null
Then close terminal window i see that dd still running and it's PPID is difference than first time.
What is happening for dd process ?
whenever killing ...
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0
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Transferring data between drives of dissimilar capacities
I have a 80 GB hard drive which contains a copy of Ubuntu and a total of about 20 GB of data. I would like to transfer this data over to a SSD that is 60 GB in capacity.
I've looked at tools such as ...
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2
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SD card cloning using the dd command - more questions
This is a bit of a follow on from another users question found here:
SD card cloning using the dd command
I have used the dd command to clone or make backup copies of SD cards with limited success. ...
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0
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Can I use a DD command in a init.d startup script in ubuntu core 16?
Can I use a DD command in a init.d startup script in ubuntu core 16?
I want to create a script that will automate the restoring of a backup image using DD command in a live ubuntu core environment, ...
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0
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0
answers
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Can't even try Ubuntu from live USB, initramfs, after accidentaly using dd to write sda for a short period of time
I know there are already some answers targeting both the problem with the initramfs prompt, and the problem about accidentally using dd and writing sda, however, I found no help with those questions, ...
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0
answers
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Can't mount dd image - shows correct used space
So one of my HD starting to give me Input/Output errors 1.5 weeks ago and I immediately went into 'backup' mode. The drive in question is a 4TB HD and I have created a dd image of it already (took 5 ...
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0
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Things to do after cloning smaller ssd to larger ssd in ubuntu
I cloned a 500GB ssd to a 1050GB ssd but I was having many issues later. I only cloned the partitions I need then later resized them. The swap partition is the only one that I didn't clone because I ...
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1
answer
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High copy speed at begining of copying
When I copy file (doesn't mater which process I use - krusader, cp, dd, ...) firstly its very fast, like way too fast (around 7000 MB/s to USB 2.0 pen-drive). Then it suddenly slows down (usually at ...
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2
answers
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Can I make an image from the disk starting at x address?
I'm trying to get a specific data from the disk starting at specific address (don't know if it was physical address or not, ex: 0x00000000DA88FFFF, with size 0x5776). Actually I'm new with disk imager ...
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0
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1
answer
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backup windows partitions with dd [duplicate]
I am on Ubuntu, I have 2 external hard drives, of of them is an SSD. The HDD is from a laptop with windows 10 on it, the SSD is completely empty, I want to use it to copy everything on the HDD to the ...
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3
votes
2
answers
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Live USB, mount second partition on same device
How to mount second partition on the same USB disk where Live Ubuntu was installed?
I was using dd to create a live USB.
I have created second VFAT partition using fdisk and formatted it using mkfs....
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37
votes
6
answers
27k
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Accidentally did dd /dev/sda
I written an ISO image to my hard disk using sudo dd if=image.iso of=/dev/sda. I meant /dev/sdc, and now running sudo fdisk -l returns only one partition on /dev/sda while there is supposed to be 6. ...
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1
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dd or equivalent everything on a disk without dding the entire disk
I have a very specific kernel structure on an sd card I'd like to copy and send to a friend.
I know I can simply dd the entire SD card, but the kernel is ~2GB, which wastes the other 14GB of the disk....
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