Check HD whether it has support Staggered Spin-Up(Pin11 of SATA Power Connectot)

Pin 11 can function for staggered spinup, activity indication, both, or nothing. It is an open collector signal, that may be pulled down by the connector or the drive. If pulled down at the connector (as it is on most cable-style SATA power connectors), the drive spins up as soon as power is applied. If left floating, the drive waits until it is spoken to, This prevents many drives from spinning up simultaneously, which might draw too much power. The pin is also pulled low by the drive to indicate drive activity. This may be used to give feedback to the user through an LED.
接地("0")時，HDD動作。浮接(空接)時，HDD等待Controller信號驅動。不是每一種HDD都可以支援。

SATA Power Connector

Pin #		Mating	Function
—			Coding notch
	1	3rd	3.3 V
	2	3rd
	3	2nd
	4	1st	Ground
	5	2nd
	6	2nd
	7	2nd	5 V
	8	3rd
	9	3rd
	10	2nd	Ground
	11	3rd	Staggered spinup/activity (in supporting drives)
	12	1st	Ground
	13	2nd	12 V
	14	3rd
	15	3rd

SATA DATA Connector

Pin #		Mating	Function
	1	1st	Ground
	2	2nd	A+ (Transmit)
	3	2nd	A− (Transmit)
	4	1st	Ground
	5	2nd	B− (Receive)
	6	2nd	B+ (Receive)
	7	1st	Ground
—			Coding notch

WD有幾款硬碟有支援ATA Command Base去喚醒它，可以把預設置設成電源關閉(Power Up in Standby)。

Staggered Spin-Up supported HDD list:

http://www.seagate.com/support/disc/manuals/sata/cuda7200_sata_pm.pdf

http://highpoint-tech.com/PDF/RR23xx/RR23xx_Compatibility_List.pdf

Effectively there have been 3 attempts by the standards to initiate Staggered Spin:

1. Original – Drive would not spin until PHY Ready was achieved.  That was not really followed and has gone by the wayside with Microsoft requirements for power to boot time for Windows systems.
2. P11 - If a drive implements P11 then the drive relies on the host to manage the state of P11 to enable/disable the drive to spin on power.  If P11 is set to enable DSS then the drive will not spin until PHY Ready is achieved.
3. PUIS – Power In Standby – If PUIS is enabled the drive will power up and remain in spun down state until the drive receives a Set Feature command instructing the drive to spin or until the drive receives a command that requires media access.