KeepAliveHD is a lightweight, open-source Windows utility designed to prevent internal and external hard drives from entering automatic standby or sleep mode. Created by developer Mladen Macanović (stsrki), the project is hosted publicly on the KeepAliveHD GitHub Repository.
The tool addresses a specific hardware frustration: many external USB hard drives feature aggressive internal firmware that forces the disk to spin down and park its heads after just a few minutes of inactivity. This firmware often completely ignores Windows advanced power plan configurations. When a user tries to access the drive again, they experience a jarring 4 to 25-second system freeze while the platters spin back up. KeepAliveHD solves this latency issue by ensuring active storage remains responsive. Core Mechanism
Keep-Alive Writes/Reads: The utility works by automatically writing a tiny text file (KeepAliveHD.txt) containing just a few bytes to the target drive at user-specified intervals (e.g., every few minutes).
Read-Only Mode: For users trying to prevent latency on Solid State Drives (SSDs) without introducing unnecessary write amplification, the software features a read-only mode that pings the drive without writing data. Key Features
stsrki/KeepAliveHD: Prevent hard-drives from going … – GitHub
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