badblocks
Search a device for bad blocks. Some usages of badblocks can cause destructive actions, such as erasing all data on a disk, including the partition table. More information: https://manned.org/badblocks.
-
Search a disk for bad blocks by using a non-destructive read-only test:
sudo badblocks {{/dev/sdX}}
-
Search an unmounted disk for bad blocks with a non-destructive read-write test:
sudo badblocks -n {{/dev/sdX}}
-
Search an unmounted disk for bad blocks with a destructive write test:
sudo badblocks -w {{/dev/sdX}}
-
Search an unmounted disk for bad blocks with a destructive write test and show verbose status:
sudo badblocks -svw {{/dev/sdX}}
-
Search an unmounted disk in destructive mode and output found blocks to a file:
sudo badblocks -o {{path/to/file}} -w {{/dev/sdX}}
-
Search an unmounted disk in destructive mode with improved speed using 4K block size and 64K block count:
sudo badblocks -w -b {{4096}} -c {{65536}} {{/dev/sdX}}
License and Disclaimer
The content on this page is copyright © 2014—present the tldr-pages team and contributors.This page is used with permission under Creative Commons Attribution 4.0 International License.
While we do attempt to make sure content is accurate, there isn't a warranty of any kind.