Fujitsu MJA2080BH, Product/Maintenance Manual

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6.2 Power Save
•
Upon receipt of a COMRESET
•
Upon receipt of Idle/Idle Intermediate
(4) Standby mode
In this mode, the spindle motor has stopped from the low power idle state.
The device can receive commands through the interface. However if a command
with disk access is issued, response time to the command under the standby mode
takes longer than the active, active idle, or low power idle mode because the
access to the disk medium cannot be made immediately.
The drive enters the standby mode under the following conditions:
•
A STANDBY or STANDBY IMMEDIATE command is issued.
•
A certain amount of time has elapsed in the low power idle state.
(APM Mode 2)
•
The time specified by the STANDBY or IDLE command has elapsed after
completion of the command.
• A reset is issued in the sleep mode.
When one of following commands is issued, the command is executed normally
and the device is still stayed in the standby mode.
• Reset (hardware or software)
• STANDBY command
• STANDBY IMMEDIATE command
• INITIALIZE DEVICE PARAMETERS command
• CHECK POWER MODE command
(5) Sleep mode
Sleep mode is the minimal of power consumption. The only method that returns
from Sleep mode is to execute Software Reset (SRST) or COMRESET. The
device enters to Standby mode after it returns from Sleep mode.
The drive enters the sleep mode under the following condition:
• A SLEEP command is issued.
In this mode, the device does not accept the command. (It is ignored.)
C141-E293 6-9