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/ 2 Years ago, thu, november 18, 2021, 1:48:08
How can I do a disk low level formatting in Ubuntu on an external hard disk so that any data recovery tools like test-disk or photorec cannot retrieve any data once formatted to ext4 or any file-system? As I was playing around with Test disk, I found that it can recover almost all old files even after formatting it many times and I want to use my external hard disk as new because it is only one year old and in warranty but without any old data.
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