Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

Head-to-head · Disk Diagnostic Software

DiskMaster vs HDAT2

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score DiskMaster #1 in Disk Diagnostic Software 9.4/10 Free plan Free plan✓ 0 of 5 features Visit DiskMaster
HDAT2 #7 in Disk Diagnostic Software 8.1/10 Free plan Free plan✓ 4 of 5 features Visit HDAT2

DiskMaster leads on 0 checks, HDAT2 on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreDiskMaster · 9.4/10
  • Free planboth
  • Most featuresHDAT2 · 4 of 5

DiskMaster scores higher on our rubric for disk diagnostic software: 9.4 against 8.1 out of 10; our editors rank them #1 and #7.

DiskMaster is the better fit for cross-platform monitoring and diagnostics. HDAT2 is the better fit for bootable low-level device diagnostics.

  • DiskMaster fits best

    Cross-platform monitoring and diagnostics

  • HDAT2 fits best

    Bootable low-level device diagnostics

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature DiskMaster 9.4/10 Visit ↗ HDAT2 8.1/10 Visit ↗
At a glance
Editor score 9.4 8.1
Ranking #1 in Disk Diagnostic Software #7 in Disk Diagnostic Software
Best for Cross-platform monitoring and diagnostics Bootable low-level device diagnostics
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop
Platforms Windows, macOS, Linux Windows
Built for Solo, Small business Solo, Small business, Mid-market, Enterprise
Features DiskMaster 0/5 · HDAT2 4/5
Bad-sector scan Not checked yet ✓ (best)
Read/write testing Not checked yet ✓ (best)
Surface scan Not checked yet Not checked yet
Bootable media Not checked yet ✓ (best)
SMART tests Not checked yet ✓ (best)
Specs
Platform Not checked yet Dos
Maximum drive size Not checked yet Not checked yet
Our review
Pros
  • SMART monitoring, self-tests, surface scans, and health scoring
  • History charts track temperature, wear, and drive counters
  • Alerts, reports, repair tools, and Windows/Linux/macOS support
  • Tests and repairs bad sectors across many storage device types
  • Includes SMART, read/write/compare, filesystem, and sector tests
  • Boots from ISO, IMG, or USB-compatible media without a paid plan
Cons
  • SMART data reading depends on supported SATA and USB drives
  • Focused on local monitoring rather than remote monitoring
  • Repair tools are optional rather than part of the core workflow
  • The main program requires real DOS and boot media
  • Windows downloads are demo versions rather than the main program
  • Some SMART functions depend on compatible ATA, SATA, SCSI, or NVMe drives
Our verdict

DiskMaster is a free, open-source desktop application for monitoring and diagnosing drive health across Windows, Linux, and macOS. It reads native SMART data from supported SATA and USB drives, calculates an itemized health score, runs…

Read the review →

HDAT2 is a freeware disk-testing and diagnostic utility for users who need low-level storage-device inspection from bootable media. It supports ATA, ATAPI, SATA, NVMe, SSD, SCSI, and USB devices, with functions for bad-sector testing and…

Read the review →
  1. DiskMasterDisk Diagnostic Software 9.4Free plan
  2. HDAT2Disk Diagnostic Software 8.1Free plan

Strengths and trade-offs

  • DiskMaster — where it wins

    • SMART monitoring, self-tests, surface scans, and health scoring
    • History charts track temperature, wear, and drive counters
    • Alerts, reports, repair tools, and Windows/Linux/macOS support

    Where it doesn't

    • SMART data reading depends on supported SATA and USB drives
    • Focused on local monitoring rather than remote monitoring
    • Repair tools are optional rather than part of the core workflow

  • HDAT2 — where it wins

    • Tests and repairs bad sectors across many storage device types
    • Includes SMART, read/write/compare, filesystem, and sector tests
    • Boots from ISO, IMG, or USB-compatible media without a paid plan

    Where it doesn't

    • The main program requires real DOS and boot media
    • Windows downloads are demo versions rather than the main program
    • Some SMART functions depend on compatible ATA, SATA, SCSI, or NVMe drives

More comparisons

All disk diagnostic software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update