Before running chkdsk , do the following to prevent data loss:
: Forces the volume to dismount (disconnect) first if necessary so the tool can lock it for repairs. chkdsk on external drive fix
For a more thorough repair, using the Microsoft Learn Command-Line Interface allows you to use specific "switches" for deeper cleaning. Before running chkdsk , do the following to
In the black window, type the following command and press : chkdsk X: /f When a bad sector is found, the utility
on the drive. When a bad sector is found, the utility marks that area as unusable to prevent future data loss and attempts to recover any readable information from the damaged block. Because this process involves scanning every sector of the disk, it can be significantly more time-consuming than a standard file system fix.
If you run /r and chkdsk hangs (gets stuck) at a certain percentage for hours, or returns "File system detected," the drive likely has physical hardware failure. In this case, stop running scans immediately and replace the drive.