Seagate ST3000VN000 manual Seek time, Start/stop times, Power specifications, Power consumption

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2.6Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table below are defined as follows:

•Track-to-track seek time is an average of all possible single-track seeks in both directions.

•Average seek time is a true statistical random average of at least 5000 measurements of seeks between random tracks, less overhead.

Typical seek times (ms)	Read		Write
Track-to-track	1.0		1.2
Average	<12.0		<12.0
Average latency		5.1

These drives are designed to consistently meet the seek times represented in this manual. Physical seeks, regardless of mode (such as track-to-track and average), are expected to meet the noted values. However, Note due to the manner in which these drives are formatted, benchmark tests that include command overhead or

measure logical seeks may produce results that vary from these specifications.

2.7Start/stop times

The start/stop times listed below are for 2TB, 3TB and 4TB models.

Power-on to ready	15	(typical)
( in seconds)	17	(max)
Standby to ready	15	(typical)
(in seconds)	17	(max)
Ready to spindle stop	10	(typical)
(in seconds)	11	(max)

Time-to-ready may be longer than normal if the drive power is removed without going through normal OS powerdown procedures.

2.8Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. Refer to Figure 1 on page 24.

2.8.1 Power consumption

Power requirements for the drives are listed in Table 3. Typical power measurements are based on an average of drives tested, under nominal conditions, using 5.0V and 12.0V input voltage at 25°C ambient temperature.

•Spinup power

Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating speed.

•Read/write power and current

Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-ms delay, then a 16-sector read followed by a 32-ms delay.

• Operating power and current

Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each 10 reads) and 20 percent drive idle mode.

• Idle mode power

Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in a random track location.

• Standby mode

NAS HDD Product Manual, Rev. A 15