SleepHDD (ver 5.5) Abandoned Freeware SleepHDD is an IDE drive utility that will spindown a BIOS recognized IDE hard drive (either disk0 or disk1). The drive can be put into either "standby" or full "sleep" mode. Program switches allow SleepHDD to perform other tasks such as displaying the drive's model, parameters and current power state; turning the drive's cache on or off; or setting a countdown timer to turn the drive off in 1 to 18 minutes. WARNING: Some IDE drives are buggy, and do not support power management commands correctly.