Seagate ST2000VN000, ST3000VN000 manual Conducted noise, Voltage tolerance

Drive Specifications www.seagate.com

During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/ write electronics are in power-down mode.

Table 2 DC power requirements (2TB)

Power dissipation (2-disk values shown)	Avg (watts 25°C)	Avg 5V typ amps	Avg 12V typ amps
Spinup	—	—	2.0
Idle* †	3.0	0.229	0.162
Operating	4.30	0.308	0.233
Standby	0.30	0.053	0.004
Sleep	0.30	0.053	0.004
Table 3 DC power requirements (3TB and 4TB)
Power dissipation (4-disk values	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
shown)
Spinup	—	—	2.0
Idle* †	3.95	0.116	0.28
Operating	4.80	0.288	0.283
Standby	0.50	0.09	0.005
Sleep	0.50	0.09	0.005

*Idle1. During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

†5W IDLE with DIPLM Enabled

2.8.2 Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.

•Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave injected noise at up to 10MHz.

•Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave injected noise at up to 10MHz.

Note Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.

2.8.3 Voltage tolerance

Voltage tolerance (including noise):

•5V

±5%

•12V

±10%

16 NAS HDD Product Manual, Rev. A