Fujitsu MBA3147RC, MBC2036RC, MBC2073RC, MBA3300RC, MBA3073RC Power Condition, ∙ ActiveWait state

Command Processing

2.6 Power Condition

The HDD has three power condition states: Active, Active_Wait, and Stopped.

Powered_On

Active_Wait Active

NOTIFY

(ENABLE SPINUP)

Stopped

STOP

STOP

START

∙Active_Wait state

∙

∙

In this state, the HDD is waiting for motor start with NOTIFY (ENABLE SPINUP). When the HDD receives a command that cannot be executed due to "not ready" during this state, the HDD reports the CHECK CONDITION status. In this case, "NOT READY [= 02]/LOGICAL UNIT NOT READY, NOTIFY (ENABLE SPINUP) REQUIRED [= 04-11]" is reported as sense data.

When the HDD receives NOTIFY (ENABLE SPINUP), it starts the motor. The HDD enters the Active state after the motor is successfully started. When the HDD receives a command that cannot be executed due to "not ready" while starting the motor, the HDD reports the CHECK CONDITION status. In this case, "NOT READY [= 02]/LOGICAL UNIT IS IN PROCESS OF BECOMING READY [= 04-01]" is reported as sense data.

When the HDD receives the STOP command, it enters the Stopped state.

Active state

In this state, the drive is ready.

Stopped state

In this state, the HDD is waiting for the START command. When the HDD receives a command that cannot be executed due to "not ready," the HDD reports the CHECK CONDITION status. In this case, "NOT READY

[= 02]/LOGICAL UNIT NOT READY, INITIALIZING COMMAND REQUIRED [= 04-02]" is reported as sense data. When the HDD receives the START command, it enters the Active_Wait state.

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