#disk #trim #check #zero #filesystem

bin+lib count-zeroes

Count zeroes on a disk or a file

3 unstable releases

0.2.1 Dec 12, 2021
0.2.0 Nov 7, 2021
0.1.0 Nov 7, 2021

#11 in #trim

Download history 7/week @ 2023-12-01 5/week @ 2023-12-29 9/week @ 2024-01-12 8/week @ 2024-01-26 9/week @ 2024-02-02 1/week @ 2024-02-09 17/week @ 2024-02-16 29/week @ 2024-02-23 20/week @ 2024-03-01 15/week @ 2024-03-08 2/week @ 2024-03-15

69 downloads per month


118 lines


Count zeroes on a disk or a file.

Installation & Usage

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


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.

No runtime deps