HDAT2
What it is
HDAT2 is a device-testing and diagnostic program for ATA, ATAPI, SATA, NVMe, SSD, and SCSI/USB devices. Its device-level tools test detected drives and can repair bad sectors. File-system testing covers MBR/GPT, boot data, and directories on FAT12/16/32, exFAT, and NTFS. SMART functions are available for ATA/SATA, SCSI, and NVMe drives. Capacity controls include SET MAX and Device Configuration Overlay features, including restoration of full drive capacity; supported SATA/NVMe devices can also be converted between 512e logical sectors and 4Kn. HDAT2 detects devices on AHCI and some RAID controllers, and USB devices through USB ASPI or BIOS when supported. The main program requires a real DOS system booted from USB, floppy disk, or CD/DVD. Its Windows demo is limited to drive-level operation, omits file-level functions, and aborts almost all commands while simulating conflicts. The freeware plan is free, for one or more machines, with redistribution without profit; it is provided as-is without warranty. The site lists version 7.6 dated 19.03.2025 as latest.
For and against
For
- Tests and can repair bad sectors.
- Provides file-system testing for FAT, exFAT, and NTFS.
- SMART functions cover ATA/SATA, SCSI, and NVMe.
- Includes capacity controls and supported sector conversion.
- Download page provides manuals, a cookbook, and FAQ.
Against
- Main program requires a real DOS boot system.
- Windows demo omits file-level operation.
- Demo aborts almost all commands.
- Versions 6.x/7.x lack AHCI Port-Multiplier support.
The verdict
HDAT2 covers device and file-system diagnostics, with SMART and capacity tools. The full program depends on DOS, while the Windows demo has substantial limits.
Who it suits
HDAT2 suits users who can boot a DOS system to diagnose supported storage devices. Its Windows demo may suit those seeking only limited drive-level operation.
Plans and prices
HDAT2 freeware
one or more machines · redistribution without profit · provided as-is without warranty
Read 30 Sep 2026 · hdat2.com
On the record
- Capacity controls
- The program implements SET MAX and Device Configuration Overlay features, including restoring full drive capacity.hdat2.com · read 30 Sep 2026
- Controller support
- HDAT2 detects devices on AHCI and some RAID controllers, and detects USB devices through USB ASPI or BIOS when supported.hdat2.com · read 30 Sep 2026
- Demo limits
- The demo operates only at drive level, does not provide file level, and aborts almost all commands while simulating conflicts.hdat2.com · read 30 Sep 2026
- Documentation
- The download page provides the HDAT2 Cookbook, user manuals, a DOS USB creation guide and an FAQ.hdat2.com · read 30 Sep 2026
- File systems
- Its file-system testing level handles MBR/GPT, boot data and directories on FAT12/16/32, exFAT and NTFS.hdat2.com · read 30 Sep 2026
- Hardware minimum
- The minimum configuration is a 386/486 CPU with coprocessor or higher, at least 1 MB RAM and a DOS boot system.hdat2.com · read 30 Sep 2026
- Known limitations
- Versions 6.x/7.x support 32-bit AHCI only and do not support AHCI Port-Multipliers.hdat2.com · read 30 Sep 2026
- Operating mode
- The main program requires a real DOS system booted from USB, floppy disk or CD/DVD; only the demo runs under Windows.hdat2.com · read 30 Sep 2026
- Purpose
- HDAT2 tests and diagnoses ATA, ATAPI, SATA, NVMe, SSD and SCSI/USB devices.hdat2.com · read 30 Sep 2026
- Repair
- Its device-testing level tests and repairs bad sectors on detected devices.hdat2.com · read 30 Sep 2026
- Sector conversion
- SATA/NVMe devices can be converted between 512e logical sectors and 4Kn when supported.hdat2.com · read 30 Sep 2026
- Security features
- The feature list includes SET SECURITY commands and drive-lock detection through the Security Menu.hdat2.com · read 30 Sep 2026
- SMART
- SMART functions are available for ATA/SATA, SCSI and NVMe drives.hdat2.com · read 30 Sep 2026
- Version
- The site lists version 7.6 dated 19.03.2025 as the latest version.hdat2.com · read 30 Sep 2026
- Windows demo
- The Win32/64 demo is distributed as HDAT2WDEM_76.EXE for Windows 32/64-bit systems.hdat2.com · read 30 Sep 2026
