This section summarizes specific power management requirements for storage devices.
38. Device and controller comply with device class power management reference specification
Required
The Storage Device Class Power Management Reference Specification, Version 1.0 or higher, provides definitions of the OnNow device power states (D0–D3) for these devices. The specification also covers device functionality expected in each power state and possible wake-up event definitions for the class. Power states D0, D1, and D3 are PC 98 requirements for hard disks, CD-ROM drives, and other mass storage devices. Support for the D1 state is not required for floppy disk devices.
39. Device supports wake-up events
Optional
For PC 98, the ability to cause a wake-up event as defined in the Storage Device Class Power Management Reference Specification, Version 1.0 or higher, is an optional feature.