Travelstar 5K160 (SATA) Hard Disk Drive Specification
4.4.3Operating modes
Operating mode | Description | |
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Start up time period from spindle stop or power down. | ||
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Seek | Seek operation mode | |
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Write | Write operation mode | |
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Read | Read operation mode | |
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Performance | The device is capable of responding immediately to idle media access requests. All | |
electronic components remain powered and the full frequency servo remains | ||
| operational. | |
| The device is capable of responding immediately to media access requests. Some | |
Active idle | ||
The head is parked near the | ||
| A device in Active idle mode may take longer to complete the execution of a | |
| command because it must activate that circuitry. | |
Low power idle | The head is unloaded onto the ramp position. The spindle motor is rotating at full | |
speed. | ||
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Standby | The device interface is capable of accepting commands. The spindle motor is | |
stopped. All circuitry but the host interface is in power saving mode. | ||
| The execution of commands is delayed until the spindle becomes ready. | |
Sleep | The device requires a soft reset or a hard reset to be activated. All electronics, | |
including spindle motor and host interface, are shut off. | ||
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Table 10. Operating mode
4.4.3.1Mode transition time
From | To | Transition | Transition Time |
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| Time (typ) | (max.) |
Standby | Idle | 2.5 | 9.5 |
Table 11. Drive ready time
4.4.3.2Operating 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 on page 58, "Drive address setting" for details.
4.4.3.3Adaptive 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.
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