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How to check whether there is bad sector on an external USB hard disk on OS X?

Fresh6 days ago
Mar 15, 202667151 views
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Problem

How can I check whether there are any bad sectors on an externally connected USB hard disk drive?

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Fix for: How to check whether there is bad sector on an external USB hard disk on OS X?

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The OS X built in command has an option that apparently will check whether there is bad block on a USB hard disk on OS X. From the official man page(Update: Bloody hell! Apple has removed the manpages from its site.): -S Cause fsck_hfs to scan the e…

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