• drive : (specifies the drive that you want to chkdsk)
• /p (Performs an exhaustive check)
• /r (locates bad sectors and recovers readable information. Implies /p)

On a Unix-based system, the equivalent utility is called fsck.

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Microsoft tech net: Chkdsk
Used without parameters, chkdsk displays the status of the disk in the current drive.

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Webopedia's Quick Reference Section
Use this Webopedia reference section for information on common Internet and computer facts and occurrences.