Seagate ST600MP0084 - 4K ユーザーズマニュアル

S

EAGATE 

E

NTERPRISE 

P

ERFORMANCE 

15K HDD 

AND 

E

NTERPRISE 

T

URBO 

SSHD SAS P

RODUCT 

M

ANUAL

, R

EV

. B

 

 17

  

This section provides information relating to the physical and electrical characteristics of the drive.

TM

Drives using the load/unload architecture provide programmable power management to tailor systems for performance and greater energy 

efficiency.

The table below lists the supported PowerChoice modes. The further down in the table, the more power savings can be realized. For 

example, Idle_B mode results in greater power savings than Idle_A mode. Standby_Z mode results in the greatest power savings. 

Idle_A

Reduced electronics

Idle_B

Heads unloaded. Disks spinning at full RPM

Idle_C

Heads unloaded. Disks spinning at reduced RPM

Standby_Y

Heads unloaded. Disks spinning at reduced RPM. 

Recovery requires the NOTIFY (Enable Spinup) command.

Standby_Z

Heads unloaded. Motor stopped (disks not spinning) 

Recovery requires the NOTIFY (Enable Spinup) command.

PowerChoice

TM 

can be invoked using one of these two methods:

• Power Condition mode page method—Enable and initialize the idle condition timers and/or the standby condition timers. The time r val-

ues are based on the values set in the Power Condition mode page. 

• START STOP UNIT command method—Use the START STOP UNIT command (OPERATION CODE 1Bh). This allows the host to 

directly transition the drive to any supported PowerChoice mode. 

If both the Power Condition mode page and START STOP UNIT command methods are used, the START STOP UNIT command request 

takes precedence over the Power Condition mode page power contro l and may disable the idle condi tion and standby condition timers. 

The REQUEST SENSE command reports the current PowerChoice state if active and also the method by which the drive entered the 

PowerChoice state.

When the drive receives a command, all power condition timers are suspended if they were enabled via the Power Condition mode p age. 

Once all outstanding commands are processed, the power condition ti mers are reinitialized to the values defined in the Power Co ndition 

mode page