CompTIA A+ Core 2 (220-1202)Software TroubleshootingMedium
A user's PC frequently freezes, boot times have become very slow, and Windows Event Viewer shows recurring disk read errors. No malware is found. Which command should the technician run to scan for and attempt to repair bad sectors on the drive?
- Abootrec /rebuildbcd
- Bdism /online /cleanup-image /restorehealth
- Cchkdsk /r
- Dsfc /scannow
Show answer & explanationAnswer & explanation
Correct answer: C. chkdsk /r
chkdsk /r scans the disk for bad sectors, attempts to recover readable information, and includes the functionality of /f (fixing file system errors). This matches the symptoms of disk read errors and freezing caused by physical/logical disk problems.
Why the other options are wrong
- A. bootrec /rebuildbcd repairs boot configuration, not disk sector errors.
- B. DISM repairs the Windows image, unrelated to disk sector health.
- D. sfc repairs OS files, not physical/logical disk sector issues.
chkdsk /r
A disk utility that checks a volume for file system errors and bad sectors, recovering readable data and marking damaged sectors as unusable.
- /f fixes file system errors only
- /r includes /f plus bad sector scanning and recovery
- Often requires a reboot if the volume is in use
Memory trick: 'R' in chkdsk /r = 'Recover' bad sectors