{"id":2283,"date":"2025-08-11T23:38:33","date_gmt":"2022-05-29T17:35:43","guid":{"rendered":""},"modified":"2025-02-02T00:46:18","modified_gmt":"2025-02-01T23:46:18","slug":"how-to-clone-disks-with-linux-dd-command","status":"publish","type":"post","link":"https:\/\/netcloud24.com\/knowledgebase\/how-to-clone-disks-with-linux-dd-command\/","title":{"rendered":"How to Clone Disks with Linux dd Command"},"content":{"rendered":"

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The dd<\/code> command in Linux is a powerful utility used for low-level copying and conversion of raw data. One of its common uses is to clone disks. In this guide, we will walk you through the steps to clone disks using the dd<\/code> command in Linux. Whether you’re performing this task on a local server or using a , this tutorial provides all the necessary steps.<\/p>\n

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Step 1: Identify the Disks<\/h2>\n

Before you start cloning, you need to identify the source and destination disks. Use the following command to list all connected disks:<\/p>\n

lsblk<\/code><\/pre>\n
Make sure to note the device names (e.g., \/dev\/sda<\/code>, \/dev\/sdb<\/code>) of the source and destination disks.<\/p>\n<\/section>\n
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Step 2: Unmount the Destination Disk<\/h2>\n
If the destination disk is mounted, you need to unmount it before cloning. Use the following command:<\/p>\n
sudo umount \/dev\/sdb1<\/code><\/pre>\n
Replace \/dev\/sdb1<\/code> with the appropriate partition name of the destination disk.<\/p>\n<\/section>\n
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Step 3: Clone the Disk<\/h2>\n
Now you can clone the disk using the dd<\/code> command. The syntax is as follows:<\/p>\n
sudo dd if=\/dev\/sda of=\/dev\/sdb bs=64K conv=noerror,sync<\/code><\/pre>\n
Here, if<\/code> specifies the input file (source disk) and of<\/code> specifies the output file (destination disk). The bs<\/code> option sets the block size, and conv=noerror,sync<\/code> ensures that the process continues even if there are read errors.<\/p>\n
**Warning:** Be very careful when using the dd<\/code> command. Ensure that you specify the correct device names, as this command will overwrite data on the destination disk.<\/p>\n<\/section>\n
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Step 4: Monitor the Progress<\/h2>\n
By default, the dd<\/code> command does not show progress. To monitor the progress of the cloning process, you can send a signal to the process:<\/p>\n
sudo kill -USR1 $(pgrep ^dd)<\/code><\/pre>\n
This command will make dd<\/code> print its current status to the terminal.<\/p>\n<\/section>\n
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Step 5: Check the Cloned Disk<\/h2>\n
Once the cloning process is complete, you should check the integrity of the cloned disk. You can use fsck<\/code> to check for errors:<\/p>\n
sudo fsck \/dev\/sdb1<\/code><\/pre>\n
Replace \/dev\/sdb1<\/code> with the appropriate partition name of the cloned disk.<\/p>\n<\/section>\n
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Step 6: Mount the Cloned Disk<\/h2>\n
Finally, you can mount the cloned disk to access the data:<\/p>\n
sudo mount \/dev\/sdb1 \/mnt<\/code><\/pre>\n
Replace \/dev\/sdb1<\/code> with the appropriate partition name, and \/mnt<\/code> is the directory where you want to mount it.<\/p>\n<\/section>\n