How do I know the hard disk has bad sectors

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Experts answer:HDTune is a compact and easy to use disk tools, its main functions are the hard disk transfer rate testing, health testing, temperature testing and the disk surface scan. In addition, can detect the hard disk firmware version, serial number, capacity, cache size, and the current UltraDMA http: iask.tech.sina.com.cn ** * * Isharat browse_file.php? Fileid = 448,535
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