Over time, bad sectors will develop and although they are able to be defined to the file system so that they are avoided, continual use of the drive will usually result in additional bad sectors forming and it is usually the harbinger of its eventual death.
This can be done in a destructive write-mode that effectively wipes the device (do backup!) or in non-destructive read-write (backup advisable as well!) and read-only modes.Īlthough there is no firm rule, it is common thinking that a new drive should have zero bad sectors. only passively waits for errors while badblocks can actively write simple patterns to every block of a device and then check them, searching for damaged areas (Just like memtest86* does with RAM).
(Self-Monitoring, Analysis, and Reporting Technology) is featured in almost every HDD still in use nowadays, and in some cases it can automatically retire defective HDD sectors. Badblocks is a program to test storage devices for bad blocks.
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