
EX800M
Specifications
2679-771339-A05
RELEASED 8/13/13
9
2.4.2
3-disk Platform
2.4.2.1
Mean Current Requirements and Power Dissipation
2.4.2.1.1 Power Savings Modes
1
2.4.3
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 legacy APM mode enabled, and the EPC 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.
2.4.3.1
SATA Advanced Power Management
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.
Operating Mode
Mean Current
1, 2
Mean Power
1, 2
12 VDC
5 VDC
Spinup Standard
3
1.900A (max)
1.225A
625 mA (peak)
220 mA
-
Spinup Fast
2.500A (max)
1.600A
625 mA (peak)
220 mA
-
Spinup Green
1.200A (max)
775 mA
625 mA (peak)
220 mA
Operational Peak Current
1.850A (peak)
1.925 mA (max)
825 mA (peak)
875 mA (max)
-
Sequential Read
400 mA
650 mA
8.1W
Sequential Write
400 mA
575 mA
7.7W
Random Read/Write
600 mA
360 mA
9W
Idle
390 mA
350 mA
6.4W
1
When running at 3 Gb/s or as a single ported device, power will be lower than the value listed.
2
All values are typical (measured at 25°C) except where specified as maximum.
3
Default spinup mode when not otherwise overridden. Use the WDSpinUp utility to modify the
spinup mode for individual drives. Go to http://support.wdc.com, then click on "Downloads" and
the drive family name to download this utility.
Mode
Mean Current
2
Mean Current
2
Mean Power
2
DIPM Off
12 VDC
5 VDC
Idle_A
350 mA
230 mA
5.4W
Idle_B
320 mA
220 mA
4.9W
Idle_C
270 mA
220 mA
4.3W
Standby_Y
150 mA
220 mA
2.9W
Standby_Z
7 mA
210 mA
1.1W
1
When running at 3 Gb/s or as a single ported device, power will be lower than the value listed.
2
All values are typical (measured at 25°C) except where specified as maximum.