Count zeroes on a disk or a file

Related tags

Utilities count-zeroes
Overview

count-zeroes

Count zeroes on a disk or a file.

Installation & Usage

cargo install count-zeroes
count-zeroes /dev/sdXN

Purpose

This is useful if you want to check if an SSD has been trimmed or a disk has been wiped-clean. I found no obvious way to do that and it's useful when you try to recover a filesystem to avoid chasing ghosts. In my case, an attempt to recover a BTRFS partition showed me there was a superblock somewhere but it was just some random unrelated data.

This program can be used as a library, it has no dependency. It is optimized for speed.

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