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badblocks
Search a device for bad blocks. Some usages of badblocks can cause destructive actions, such as erasing all the data on a disk, including the partition table.
- Search a disk for bad blocks by using a non-destructive read-only test:
sudo badblocks {{/dev/sda}}
- Search an unmounted disk for bad blocks with a non-destructive read-write test:
sudo badblocks -n {{/dev/sda}}
- Search an unmounted disk for bad blocks with a destructive write test:
sudo badblocks -w {{/dev/sda}}