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On the recordRead 29 Sep 202614 facts

DiskMaster

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What it is

DiskMaster is a free desktop tool for monitoring drive health on Windows, Linux, and macOS. It reads SMART attributes, self-tests, and drive test logs, then calculates a health score out of 100 with deductions linked to their source attributes; performance receives a separate score. Readings are saved in SQLite and presented in charts, with alerts for changes such as rising drive counters. A read-only surface scan times blocks, confirms unreadable sectors with another read, and maps them to sectors. DiskMaster can identify files associated with unreadable sectors and attempt to rescue copies while skipping unreadable bytes. Optional repair tools include sector repair, filesystem repair, zero-fill, and sanitizing bad sectors the filesystem marks as free. Alerts can go to Slack, Discord, ntfy, email, desktop notifications, commands, or JSON webhooks. Its command-line interface exports text, HTML, JSON, and CSV reports. SATA and USB monitoring needs no third-party tools; NVMe health logs and macOS use optional smartmontools. Raw SMART access requires administrator or sudo privileges. The project describes it as suited to deep monitoring of one machine, with JSON output designed to feed a fleet tool.

For and against

For

  • Free and available for Windows, Linux, and macOS.
  • Shows health deductions linked to source attributes.
  • Stores readings and provides charts and alerts.
  • Can map unreadable sectors to associated files.
  • Exports reports in four formats.

Against

  • Raw SMART access requires administrator or sudo privileges.
  • NVMe logs and macOS use optional smartmontools.
  • Remote monitoring is not supported.
  • Windows builds are unsigned.

The verdict

DiskMaster combines health scoring, drive history, surface scanning, and alerting in a local desktop tool. Its permissions and optional dependency requirements matter when planning monitoring across different drives and systems.

Who it suits

It suits people who want detailed local drive-health monitoring on Windows, Linux, or macOS. The README describes it as focused on one machine, with JSON output available for feeding a fleet tool.

Plans and prices

DiskMaster

Free

Free / open-source; local desktop drive health monitoring

Read 29 Sep 2026 · github.com

Every plan, in full

On the record

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 · read 29 Sep 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 · read 29 Sep 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 · read 29 Sep 2026
File mapping and rescue
It can identify files associated with unreadable sectors and rescue a copy while skipping unreadable bytes.github.com · read 29 Sep 2026
Health score
It calculates a health score from 100 and lists each deduction and its source attribute; performance is scored separately.github.com · read 29 Sep 2026
History and alerts
It stores readings in SQLite and provides charts and alerts for changes such as rising drive counters.github.com · read 29 Sep 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 · read 29 Sep 2026
Maker
The maker profile identifies Jan Kučera, lists Ostrava, Czechia, and describes a family of single-purpose desktop tools.github.com · read 29 Sep 2026
Purpose
DiskMaster monitors drive health on Windows, Linux and macOS.github.com · read 29 Sep 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 · read 29 Sep 2026
Security and integrity
The project says Windows builds are unsigned and each release archive includes a SHA-256 checksum.github.com · read 29 Sep 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 · read 29 Sep 2026
Surface scans
Its read-only surface scan times blocks, confirms unreadable sectors with a second read, and maps them to sectors.github.com · read 29 Sep 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 · read 29 Sep 2026

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