sleepydisk tool
sleepydisk is a small free and open source tray utility for Windows that spins a harddisk drive down when its not used. Some drives either ignore Windows' standby commands or Windows itself can't figure out dispatching the standby commands, even though you told it to in the power configuration settings. Additionally, Windows doesn't provide provisions for targeting individual drives, so this can come in handy if you have drives that are for instance only used for media.
Contents
Features
Designed to run at startup or from command line tooling, the program periodically monitors I/O and open files on the disk.
If nothing should keep the drive awake, smartctl is used to issue a standby command that safely spins the drive down. The drive awakens itself again when users or programs access files outside of the cache, at which point sleepydisk after an idle period monitors and spins the drive down again when possible.
Read more about setup and options in the readme.
License
This project is licensed under GPL v3.