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Tags: hard-drive   data-recovery   dd  
Link: 🔍 See Original Answer on Ask Ubuntu 🔗

Title: Accidentally did dd /dev/sda
ID: /2018/01/17/Accidentally-did-dd-_dev_sda
Created: January 17, 2018    Edited:  June 12, 2020
Upload: November 24, 2022    Layout:  post
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Testdisk to the rescue

I can personally vouch for Testdisk which saved my data after I was repeatedly copying and pasting instructions for /dev/sdb and changing it to /dev/sdd which was my USB. Only one time I forgot to change it and there went my /dev/sdb into the dustbin.

Setup your system to never write to /dev/sda

I strongly recommend creating a wrapper script: Prevent dd from destroying SSD or HDD. This ensures dd never writes to /dev/sda or possibly /dev/sdb or any other of your mass storage devices.

⇧ Upgrade from 17.04 to 17.10 Will 16.04 LTS ISO image be modified to include Spectre and Meltdown fixes?  ⇩