Hitachi HTS543280L9SA00 Manual Do Utilizador

 

 

5K320 SATA OEM Specification 

 

21 

4.4.3 

Operating modes 

Start up time period from spindle stop or power down. 

Seek operation mode 

Write operation mode 

Read operation mode 

The device is capable of responding immediately to 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 
circuitry—including servo system and R/W electronics—is in power saving mode. 
The head is parked near the mid-diameter the disk without servoing.     
A device in Active idle mode may take longer to complete the execution of a 
command because it must activate that circuitry. 

The head is unloaded onto the ramp position. The spindle motor is rotating at full 
speed. 

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. 

The device requires a soft reset or a hard reset to be activated. All electronics, 
including spindle motor and host interface, are shut off. 

Table 10. Operating mode

 

4.4.3.1    Mode transition time 

From 

To 

Time (typ) 

(max.) 

Standby Idle 

2.5 

9.5 

Table 11. Drive ready time

4.4.3.2   Operating mode at power on 

The device goes into Idle mode after power on or hard reset as an initial state.. 

4.4.3.3    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.