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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}}

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