Diagnosing and Erasing Hard Drives

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Ubuntu - Reallocated sectors and SMART testing

If the Reallocated Sector Count is highlighted with a high count, REPLACE THE DRIVE; they are prone to failure and unexpected capacity loss! While SMART Extended is better, a quick test may be sufficient.
Locate the following SMART attributes: Reallocated sector count; Current pending sector count.
To run a SMART Extended Self-Test, left click Start Self-Test. Select Extended from the drop-down menu.

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