spin down an IDE hard drive, to conserve power This code is public domain (no copyright). You can do whatever you want with it. Time to Drive return to Power state ACTIVE state consumption ----- ------------ ----------- ACTIVE zero highest IDLE less than STANDBY(?) less than ACTIVE STANDBY up to 30 seconds less than IDLE SLEEP (must reset drive) lowest Both idle and standby can use a timer built into the drive (IDLE/STANDBY commands instead of IDLE IMMEDIATE/STANDBY IMMEDIATE). SLEEP state can only be exited by resetting the drive

ata-idle.c

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