Seagate ST3250312AS, SGTST3000DM0011CH166, ST31000524AS manual Conducted noise, Voltage tolerance

www.seagate.com			Drive Specifications
Table 4 DC power requirements (2-disk)
Power dissipation (2-disk values shown)	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup	—	—	2.0 (peak)
Idle* †	5.0	0.168	0.337
Idle* † (with offline activity)	5.40	0.153	0.387
Operating	6.57	0.496	0.341
Standby	0.79	0.35	0.01
Sleep	0.79	0.35	0.01
Table 5 DC power requirements (1-disk)
Power dissipation (1-disk values shown)	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup	—	—	2.0 (peak)
Idle* †	4.60	0.378	0.224
Idle* † (with offline activity)	4.50	0.250	0.240
Operating	6.19	0.656	0.243
Standby	0.79	0.35	0.01
Sleep	0.79	0.35	0.01

*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.

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

Note current.

2.8.3 Voltage tolerance

Voltage tolerance (including noise):

•5V +10% / -7.5%

•12V +10% / -7.5%

Barracuda SATA Product Manual, Rev. B 19