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#Use copycatx to image a linux hd how to#
#Use copycatx to image a linux hd manual#

nixCraft is a one-person show, and many of you use Adblocker. 🥺 Was this helpful? Please add a comment to show your appreciation or feedback. Join the nixCraft community via RSS Feed or Email Newsletter. He wrote more than 7k+ posts and helped numerous readers to master IT topics. Vivek Gite is the founder of nixCraft, the oldest running blog about Linux and open source.

#Use copycatx to image a linux hd manual#

For more info see the following manual pages using the man command or help command: I hope this quick tutorial helps someone with disk and partition cloning under Linux and making disk images with the dd command. Want to deal with corrupted disk under Linux or UNIX? Try the ddrescue command.Not a fan of dd? See top 6 open source disk cloning and imaging software.Gdd (GNU DD) in action with progress bar running on MacOS X Tip #3: Save extra information # dd if=/dev/sdc1 of=/dev/sdd1 bs=128K conv=noerror,sync status=progress You need to use GNU/BSD dd with coreutils version 8.24 as follows (pass the status=progress to the dd): Tip #2: See progress while making an image with dd dd of=/dev/sdb : Write data received from “ ssh.Send the data to the dd command on the local machine. gunzip -c : Uncompress data and write to stdout.Send data to the gunzip command using shell pipes. ssh 'dd if=centos-core-7.gz status=progress' : SSH into the given server and run the dd command to read the disk image.# ssh 'dd if=centos-core-7.gz status=progress' | gunzip -c | dd of=/dev/sdb # ssh 'dd if=centos-core-7.gz' | gunzip -c | dd of=/dev/sdb

#Use copycatx to image a linux hd how to#

Here is how to restore image from local system: ssh 'dd of=centos-core-7.gz' : Log into the given server and run the dd command to make a new disk image named centos-core-7.gz from compressed data sent by the gzip command.Finally, pass that data to the ssh command. gzip -c : Compress data received via pipes and write output on standard output (stdout) while keeping original files unchanged.dd if=/dev/da0 conv=sync,noerror bs=128K status=progress : Make /dev/da0 disk image and pass that output to the gzip command.# dd if=/dev/da0 conv=sync,noerror bs=128K status=progress | gzip -c | ssh 'dd of=centos-core-7.gz' You can see status with dd command as follows: # dd if=/dev/da0 conv=sync,noerror bs=128K | gzip -c | ssh 'dd of=centos-core-7.gz' You can send the image through ssh and save it on the remove box called : # gunzip -c centos-core-7.gz | dd of=/dev/da0 Tip #1: Not enough disk space locally? Use the remote box # gunzip -c IMAGE.HERE-GZ | dd of=/dev/OUTPUT/DEVICE-HERE The above command just cloned the entire hard disk, including the MBR, bootloader, all partitions, UUIDs, and data. # dd if=/dev/da0 conv=sync,noerror bs=128K | gzip -c > centos-core-7.gz cloning /dev/da0 and save in the current directory: In this example, create disk image for /dev/da0 i.e. The syntax is as followsĭd if=/dev/INPUT/DEVICE-NAME-HERE conv=sync,noerror bs=64K | gzip -c > /path/to/ You can store disk image on an external USB disk. Once booted, make sure no partitions are mounted from the source hard drive disk. You can boot from a live cd or USB pen drive. Making disk image with dd using live CD/DVD or USB pen drive To clone /dev/sdc1 to /dev/sdd1 with dd and create an image, enter: How to clone a partition and make disk image with dd sync : Add input blocks with zeroes if there were any read errors, so data offsets stay in sync.

conv=noerror : Tell dd to continue operation, ignoring all read errors.

# dd if=/dev/ada0 of=/dev/adb0 bs=64K conv=noerror,sync In this example, I am going to clone /dev/ada0 (250G) to /dev/adb0 (250G) in FreeBSD and make an image using dd. # dd if=/dev/sdc of=/dev/sdd bs=64K conv=noerror,sync To clone /dev/sdc (250G) to /dev/sdd (250G) in Linux, enter: The syntax is as follow to make disk image with dd:ĭd if=/dev/input/DEVICE-HERE of=/dev/OUTPUT/DEVICE-HERE bs=64K conv=noerror,sync However, if you have multiple disks, it is possible to do it online. Typically we boot from a live USB or DVD and create disk images. Remember the input file order ( if=) and output file ( of=). You should be very careful when using the dd command it can destroy data. The nixCraft or author is not responsible for data loss. WARNING! These examples may crash your computer if executed.