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DiskMon-Mail is a free, open-source disk space and health monitoring tool designed for system administrators, IT professionals, and managed service providers. It provides automated email alerts for low disk space and disk health issues (via SMART), helping you prevent outages and data loss before they happen.
Instructions can be found here: https://github.com/Monstertov/diskmon-mail
Key Features:
- Cross-platform support: Windows, Linux (x86_64, ARM64, ARM32)
- Monitors all local disks (excludes USB/network drives)
- Configurable disk space threshold (default: 10%)
- Optional disk health (SMART) monitoring for early failure detection
- Email alerts with detailed system and disk information
- Simple YAML configuration, robust error handling
- No external dependencies required (uses smartmontools if available for enhanced health checks)
- Lightweight, fast, and easy to automate (Task Scheduler, cron, systemd)
Features
- Monitors all local disks (excluding USB drives and network mounts)
- Checks available disk space against your configured threshold
- Provides detailed system information in alerts
- Works silently in the background
- Gathers SMART status information (may take a few seconds on Windows)
- Sends email alerts when disk space drops below the threshold or when disk errors are detected
