Program has 2 levels:

Drive level testing
- main function is testing and repair (regenerates) bad sectors for detected devices
- you get many information about detected devices

File level testing
- read/find/check items (MBR, boot, directories, etc.) of file system FAT12/16/32
- check/remove (regenerates) bad sectors records, flags in FAT table

Features:

* fully implemented commands: SET MAX, SET SECURITY, Device Configuration Overlay
* device access with interrupt 13h, direct via ATA ports, with ASPI drivers
* detects ATA/ATAPI/SATA/SATA with NCQ devices with on-board and add-on controller cards
* detects USB devices via USB ASPI driver only
* detects SCSI hard drives via INT13h or ASPI drivers
* other SCSI devices are detected via ASPI drivers only (must be loaded before)
* with ASPI drivers you got more informations about SCSI devices
* test and repair device for bad sectors
* many different test-functions for hard drives
* resize hard drives which supports SET MAX ADDRESS/EXT (supports 28/48-bits LBA addressing modes)
* drive lock detection via security feature (Security Menu)
* S.M.A.R.T. functions for ATA/SATA and SCSI/USB drives only
* informations about devices (ATA/ATAPI, INT13h, ASPI)
* sector viewer for devices (also for ZIP, CD-data discs)
* to access ATA/SATA CD-ROM drive you don't need any driver or MSCDEX
* enable/disable some features for direct-access devices
* Device Configuration Overlay (DCO) feature set (you can restore a full capacity 
or allow/disallow some feature sets of hard drive)