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Disk Sentinel is a lightweight Linux daemon designed to intelligently manage mechanical hard drives (HDDs) by placing them into standby mode when idle — without causing unnecessary wake-ups.
Its main goal is to reduce mechanical wear, power consumption, noise, and heat, especially in servers, NAS systems, and homelab environments where many disks contain cold or rarely accessed data.
Unlike traditional power management tools, Disk Sentinel focuses on a NO-WAKEUP philosophy: it avoids polling or monitoring methods that accidentally spin disks up, ensuring they stay truly idle until real access is required.
Features
- Prevents unnecessary HDD spin-ups
- Per-disk configuration and control
- Systemd service with logging
- Designed for Debian, Ubuntu, Proxmox and similar systems
- Ideal for backup disks, media archives, and cold storage
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