No. 8 of 25 ·Hardware Diagnostic Software

HDAT2

Windows

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Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

HDAT2 is ranked #8 of 25 in hardware diagnostic software on Freedom251. It runs on Windows. There is a free plan.

HDAT2 plans and pricing

All plans

HDAT2 freeware Free one or more machines · redistribution without profit · provided as-is without warranty hdat2.com · 30 Sept 2026

Compared on hardware diagnostic software

Free plan: Yes
Bad-sector scan: Yes
Read/write testing: Yes
Bootable media: Yes
Platform: dos
SMART tests: Yes

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The record

Purpose: HDAT2 tests and diagnoses ATA, ATAPI, SATA, NVMe, SSD and SCSI/USB devices.
Repair: Its device-testing level tests and repairs bad sectors on detected devices.
File systems: Its file-system testing level handles MBR/GPT, boot data and directories on FAT12/16/32, exFAT and NTFS.
SMART: SMART functions are available for ATA/SATA, SCSI and NVMe drives.
Capacity controls: The program implements SET MAX and Device Configuration Overlay features, including restoring full drive capacity.
Sector conversion: SATA/NVMe devices can be converted between 512e logical sectors and 4Kn when supported.
Controller support: HDAT2 detects devices on AHCI and some RAID controllers, and detects USB devices through USB ASPI or BIOS when supported.
Security features: The feature list includes SET SECURITY commands and drive-lock detection through the Security Menu.
Operating mode: The main program requires a real DOS system booted from USB, floppy disk or CD/DVD; only the demo runs under Windows.
Windows demo: The Win32/64 demo is distributed as HDAT2WDEM_76.EXE for Windows 32/64-bit systems.
Demo limits: The demo operates only at drive level, does not provide file level, and aborts almost all commands while simulating conflicts.
Hardware minimum: The minimum configuration is a 386/486 CPU with coprocessor or higher, at least 1 MB RAM and a DOS boot system.
Version: The site lists version 7.6 dated 19.03.2025 as the latest version.
Known limitations: Versions 6.x/7.x support 32-bit AHCI only and do not support AHCI Port-Multipliers.
Price from: Free

Where it ranks on Freedom251

Best Hardware Diagnostic Software in 2026#8 of 25
Best Disk Diagnostic Software in 2026#8 of 25

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Sources

hdat2.com/description.html· checked 30 Sept 2026
hdat2.com/download.html· checked 30 Sept 2026
hdat2.com/hdat2_main.html· checked 30 Sept 2026