DiskMaster

Summary

DiskMaster is a free desktop tool for monitoring drive health on Windows, Linux, and macOS. It reads SMART attributes, self-tests, and test logs, then calculates a health score from 100 with deductions tied to source attributes; performance is scored separately. Readings are kept in SQLite and presented in charts, with alerts for changes such as rising drive counters. Its read-only surface scan times blocks, checks unreadable sectors with a second read, and maps them to sectors. DiskMaster can identify files associated with unreadable sectors and try to rescue a copy while skipping unreadable bytes. Optional tools cover sector repair, filesystem repair, zero-fill, and sanitizing bad sectors shown as free by the filesystem. Alerts can be sent through Slack, Discord, ntfy, email, desktop notifications, commands, or JSON webhooks. The command-line tool exports text, HTML, JSON, and CSV reports. SATA and USB monitoring needs no third-party tools; NVMe logs and macOS use optional smartmontools. Raw SMART access requires administrator or sudo privileges.

Who it is for

DiskMaster suits someone who wants detailed drive-health monitoring on one machine, or wants JSON output to feed a fleet tool. Users should be comfortable granting administrator or sudo access for raw SMART readings.

Compared on disk health monitoring software

Free plan

Yesgithub.com

Facts

Purpose

DiskMaster monitors drive health on Windows, Linux and macOS.github.com · 29 Sept 2026

SMART monitoring

It reads SMART attributes, self-tests and drive self-test logs, using native ATA pass-through for SATA and USB drives.github.com · 29 Sept 2026

Health score

It calculates a health score from 100 and lists each deduction and its source attribute; performance is scored separately.github.com · 29 Sept 2026

History and alerts

It stores readings in SQLite and provides charts and alerts for changes such as rising drive counters.github.com · 29 Sept 2026

Surface scans

Its read-only surface scan times blocks, confirms unreadable sectors with a second read, and maps them to sectors.github.com · 29 Sept 2026

File mapping and rescue

It can identify files associated with unreadable sectors and rescue a copy while skipping unreadable bytes.github.com · 29 Sept 2026

Repair tools

Optional repair tools include sector repair, sanitizing bad sectors proven free by the filesystem, filesystem repair, and zero-fill, each with confirmations and safeguards described in the README.github.com · 29 Sept 2026

Integrations

Alerts can be sent through Slack, Discord, ntfy, email, desktop notifications, or a user-specified command; webhooks can also target JSON endpoints.github.com · 29 Sept 2026

CLI and exports

The CLI exports text, HTML, JSON and CSV reports and returns exit codes 0 for healthy, 1 for warning, and 2 for critical.github.com · 29 Sept 2026

Dependencies and access

SATA and USB monitoring needs no third-party tools, while NVMe health logs and macOS use optional smartmontools; raw SMART access requires administrator or sudo privileges.github.com · 29 Sept 2026

Security and integrity

The project says Windows builds are unsigned and each release archive includes a SHA-256 checksum.github.com · 29 Sept 2026

Download formats

The latest release provides Windows x64 ZIP, Linux x64 tar.gz, and macOS arm64 tar.gz builds that do not require Python.github.com · 29 Sept 2026

Who it is for

The README describes DiskMaster as suited to monitoring one machine deeply and says its JSON output is designed to feed a fleet tool.github.com · 29 Sept 2026

Maker

The maker profile identifies Jan Kučera, lists Ostrava, Czechia, and describes a family of single-purpose desktop tools.github.com · 29 Sept 2026

Where it ranks on Everything Xiaomi

• Best Disk Health Monitoring Software in 2026#6 of 30
• Best Disk Diagnostic Software in 2026#3 of 25

Sources

• github.com/hclivess/diskmaster· checked 29 Sept 2026
• github.com/hclivess/diskmaster/releases· checked 29 Sept 2026
• github.com/hclivess· checked 29 Sept 2026