Hitachi T7K250 - Deskstar - Hard Drive - Interface Capability for Power Modes

Deskstar T7K250 Hard Disk Drive Specification
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10.6.4 Interface capability for power modes
Each power mode affects the physical interface as defined in the following table:
Ready (RDY) is not a power condition. A device may post ready at the interface even though the media may not be
accessible.
Table 57: Power conditions
Mode BSY RDY Interface active Media
Active x x Yes Active
Idle o 1 Yes Active
Standby o 1 Yes Inactive
Sleep x x No Inactive