HGST Ultrastar 7K2 User Manual

Ultrastar 7K2
HGST Hard Disk Drive
Technical Reference Manual
13
Electrical Specifications
Mean Current Requirements and Power Dissipation
Operating Mode
Mean Current
1, 2
Mean Power
1, 2
12 VDC 5 VDC
Spinup Standard
3
1710 mA (max)
735 mA
520 mA (peak)
295 mA
-
Spinup Fast
2385 mA (max)
1350 mA
550 mA (peak)
295 mA
-
Spinup Green
1190 mA (max)
510 mA
505 mA (peak)
295 mA
-
Operational Peak Current
1545 mA (peak)
1600 mA (max)
870 mA (peak)
860 mA (max)
-
Sequential Read 315 mA 720 mA 7.4W
Sequential Write 315 mA 730 mA 7.4W
Random Read/Write 485 mA 455 mA 8.1W
Idle 315 mA 430 mA 5.9W
1
When running at 3 Gb/s or as a single ported device, power will be lower than the value listed.
2
All
peak and mean values are typical (measured at 25°C) except where specified as maximum.
3
Default
spinup mode when not otherwise overridden.
Mode
Mean Current
2
Mean Current
2
Mean Power
2
DIPM Off
12 VDC 5 VDC
Idle_A 310 mA 290 mA 5.2W
Idle_B 295 mA 290 mA 5.0W
Idle C 110 mA 290 mA 2.8W
Standby Y 110 mA 290 mA 2.8W
Standby_Z 10 mA 285 mA 1.5W
1
When running at 3 Gb/s or as a single ported device, power will be lower than the value listed.
2
All peak and mean values are typical (measured at 25°C) except where specified as maximum.
Power Savings Modes
This product is capable of supporting both legacy ATA Advanced Power Management (APM) mode and
the new more extensive Extended Power Conditions (EPC) standards. Unless otherwise specified, the
default disk drive is shipped with the EPC mode enabled, and the legacy APM modes can be enabled via
the Set Feature command (Feature ‘4A’h, Sub Command ‘04’h). These two power savings
implementations are exclusively used, and thus not simultaneously supported.
This drive supports the legacy ATA power management commands that lower the average power
consumption of the hard drives. For example, to take advantage of the lower power consumption modes
of the drive, an energy efficient host system could implement a power management scheme that issues a
Standby Immediate command when a host resident disk inactivity timer expires. The Standby Immediate
command causes the drive to spin down and enter a low-power mode. Subsequent disk access commands
would cause the drive to spin up and execute the new command. To avoid excessive wear on the drive due
to the starting and stopping of the HDA, set the host’s disk inactivity timer to no shorter than ten minutes.

HGST Ultrastar 7K2 Specifications

General

Brand	HGST
Model	Ultrastar 7K2
Category	Storage
Language	English