Badblocks: Difference between revisions

Revision as of 01:19, 4 July 2020

Badblocks is a tool for detecting bad blocks in your hard disk.

The following will write to every block and read back to identify the number of bad blocks.

This is a destructive test.

badblocks -wsv -b 4096 /dev/sdg

To save the list of bad blocks, you need to run fsck or mkfs.ext4:

sudo e2fsck -fcck /dev/device
- -f force check
- -cc non-destructive write test
- -k add bad blocks to bad blocks list
mkfs.ext4 -cc /dev/device

@@ Line 7: / Line 7: @@
 badblocks -wsv -b 4096 /dev/sdg
 </pre>
-* <code>-w</code> do a write test
+* <code>-w</code> do a destructive write test
 * <code>-s</code> show progress
 * <code>-v</code> verbose
 * <code>-b ''num''</code> block size. Use 4096 typically.
 * <code>-p ''num''</code> do ''num'' iterations. Typically 1 is sufficient.
 * <code>-t ''test_pattern''</code> Test pattern. Select from [random,
+To save the list of bad blocks, you need to run <code>fsck</code> or <code>mkfs.ext4</code>:
+* <code>sudo e2fsck -fcck /dev/device</code>
+** <code>-f</code> force check
+** <code>-cc</code> non-destructive write test
+** <code>-k</code> add bad blocks to bad blocks list
+* <code>mkfs.ext4 -cc /dev/device</code>
 ==Resources==
 * [[Archwiki: Badblocks]]