HDAT2 4.53

The main function is test and repair (regenerates) bad sectors for detected devices.


  • fully implemented commands: SET MAX, SET SECURITY, Device Configuration Overlay (DCO)
  • device access with interrupt 13h, direct via ATA ports, with ASPI drivers
  • detects ATA/ATAPI/SATA devices with on-board and add-on controllers
  • detects devices on AHCI/RAID controllers (just only on ports 0-3)
  • detects USB devices via USB ASPI driver or BIOS (if supported)
  • detects SCSI hard drives via BIOS interrupt 13h or ASPI drivers
  • other SCSI devices are detected via ASPI drivers only (must be loaded before); with ASPI drivers you will get more information about SCSI devices
  • test and repair device for bad sectors (so far version 4.5.3 only)
  • 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 drives only
  • information about devices (ATA/ATAPI, BIOS interrupt 13h, ASPI, EDD)
  • sector viewer for devices (also for USB, ZIP, CD-data discs)
  • to access ATA/SATA CD/DVD 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)

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