HDDHealth Monitor

Free & Open Source

Low-level S.M.A.R.T. health monitor for ATA, USB, and NVMe drives on Windows.

HDDHealth Monitor main window showing disk health overview

HDDHealth Monitor S.M.A.R.T. attribute detail view

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What It Does

HDDHealth Monitor reads raw S.M.A.R.T. data directly from physical drives via DeviceIoControl and presents it through a clean, modern GUI. It supports three drive types through their respective Windows IOCTLs:

ATA / SATA drives via IOCTL_ATA_PASS_THROUGH_DIRECT
USB bridge chips (JMicron, ASMedia, Realtek, Cypress, etc.) via IOCTL_SCSI_PASS_THROUGH_DIRECT using SAT (SCSI-ATA-Translation)
NVMe drives via IOCTL_STORAGE_QUERY_PROPERTY, reading Health Info Log 0x02

Features

Per-drive health percentage and performance metric
Full S.M.A.R.T. attribute table (ID, value, worst, raw, status)
Temperature / health / failure critical alerts via tray notifications
Hot-plug aware — USB drives detected on arrival
Per-drive history graph (health % and individual attribute over time)
Save-screenshot feature (PNG via GDI+)
Multi-drive tray icons

Compatibility

Windows 11 Windows 10 Windows 8.1 Windows 8 Windows 7 Windows Vista

Build from Source

Requires MinGW-w64 or TDM-GCC (any recent GCC with C++ support).

# MinGW / MSYS2
make

# TDM-GCC
mingw32-make

The output binary is placed at bin/HDDHealth.exe.