Hitachi HTS541040G9AT00 Specifications - Page 31
Mode transition time - from Standby to Idle, 4.3.3, Operating mode at power on, 4.3.4, - 0 interface
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Table 11: Description of operating modes Operating mode Description Standby Sleep The device interface is capable of accepting commands. The spindle motor is stopped. All circuitry except the host interface is in power saving mode. The execution of com- mands is delayed until the spindle becomes ready. The device requires a soft reset or a hard reset to be activated. All electronics, including spindle motor and host interface, are shut off. 4.4.3.2 Mode transition time - from Standby to Idle Table 12: Drive ready time From To Transition Time (typ) Transition Time (max.) Standby Idle 2.5 9.5 4.4.3.3 Operating mode at power on The device goes into Idle mode after power on or hard reset as an initial state. Initial state may be changed to Standby mode using pin C on the interface connector. Refer to section 7.10, "Drive address setting" on page 55 for details. 4.4.3.4 Adaptive power save control The transient timing from Performance Idle mode to Active Idle mode and Active Idle mode to Low Power Idle mode is controlled adaptively according to the access pattern of the host system. The transient timing from Low Power Idle mode to Standby mode is also controlled adaptively, if it is allowed by Set Features Enable Advanced Power Management subcommand. Travelstar 5K100 Hard Disk Drive Specification 17