Diagnosing and Erasing Hard Drives

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Parted Magic - 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.
In the Attributes tab, locate the following SMART attributes: Reallocated Sector Count; Reallocation Event Count; Current Pending Sector Count.
To test the drive, select Perform Tests. Click Test type: and select Extended Self-Test.

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