CheckDisk is a powerful tool for searching and repairing disk errors. It is quite similar to the ScanDisk tool or chkdsk.exe, supplied with the Windows operating systems. You can select either standard or full tests. The full test additionally performs a sector check. It is capable of finding bad sectors on your disk and marking them as such. CheckDisk will work with HDDs (including SCSI and RAID), removable media and CDs.