HDAT2 vs HDDScan

HHDAT28.1Visit HDDScan8.0Visit

Higher score H HDAT2 #7 in Disk Diagnostic Software 8.1/10 Free plan Free plan✓ 4 of 5 features Visit HDAT2

vs

HDDScan #8 in Disk Diagnostic Software 8.0/10 Free plan Free plan✓ 0 of 5 features Visit HDDScan

• HDAT2 fits best

  Bootable low-level device diagnostics

• HDDScan fits best

  Free technical Windows diagnostics

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Side by side

Feature	HHDAT2 8.1/10 Visit ↗	HDDScan 8.0/10 Visit ↗
At a glance
Editor score	8.1	8.0
Ranking	#7 in Disk Diagnostic Software	#8 in Disk Diagnostic Software
Best for	Bootable low-level device diagnostics	Free technical Windows diagnostics
Pricing model	Free	Free
Starting price	Free plan	Free
Free plan	✓	✓
Free trial	—	—
Deployment	Desktop	Desktop
Platforms	Windows	Windows
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business
Features HDAT2 4/5 · HDDScan 0/5
Bad-sector scan	✓ (best)	Not checked yet
Read/write testing	✓ (best)	Not checked yet
Surface scan	Not checked yet	Not checked yet
Bootable media	✓ (best)	Not checked yet
SMART tests	✓ (best)	Not checked yet
Specs
Platform	Dos	Not checked yet
Maximum drive size	Not checked yet	Not checked yet
Our review
Pros	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	SMART analysis plus short, extended, and conveyance tests Surface verification, read, erase, and butterfly read tests Reports, temperature monitoring, background operation, and command-line support
Cons	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	Windows platform coverage limits use on other operating systems SSD wear tracking is not part of the documented feature set Remote monitoring and configurable temperature alerts are not included
Our verdict	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 →	HDDScan is a freeware diagnostic utility for hard disk drives, SSDs, USB storage, FireWire devices, SCSI drives, and supported RAID volumes. It is aimed at Windows users who need technical visibility into drive health, identity,… Read the review →

Strengths and trade-offs

• 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

• HDDScan — where it wins

  • SMART analysis plus short, extended, and conveyance tests
  • Surface verification, read, erase, and butterfly read tests
  • Reports, temperature monitoring, background operation, and command-line support

  Where it doesn't

  • Windows platform coverage limits use on other operating systems
  • SSD wear tracking is not part of the documented feature set
  • Remote monitoring and configurable temperature alerts are not included

• HHDAT28.1/10 · Free plan

  A free bootable toolkit for low-level storage testing, repair, and inspection.

  Visit HDAT2Full verdict →
• HDDScan8.0/10 · Free plan

  A free Windows diagnostic utility with SMART analysis, surface tests, reports, and monitoring.

  Visit HDDScanFull verdict →