Seagate ST360020ACE, ST320410ACE, ST380020ACE, ST340810ACE Track-to-track seek Time msec typical

U Series CE Family Product Manual, Rev. A					3
Drive Specification	ST380020ACE	ST360020ACE	ST340810ACE	ST320410ACE
Track-to-track seek
time (msec typical)		1.2 (read) 2.0 (write)
Average seek time
(msec typical)	8.9
Average seek read
(msec typical)	9.9
Average seek write
(msec typical)	10.9
Full-stroke seek time
(msec typical)		22.0 (read) 24.0 (write)
Average latency
(msec)		5.55 msec
Power-on to ready
(sec typical)		6.5 sec
Standby to ready
(sec typical)		6.5 sec
Spindown
(sec typical)		10 sec
Startup current
(typical)		2.5 amps
Seek power (typical)		7.5 watts
Read/Write power		7.5 watts
Idle mode (typical)		5.0 watts
Standby mode
(typical)		1.2 watts
Sleep mode (typical)		0.9 watts
Voltage tolerance		5V ± 5%, 12V ± 10%
(including noise)
Ambient temperature	0° to 60°C (op.), –40° to 70°C (nonop.)
Temperature gradient
(°C per hour max)		20°C
Relative humidity		5% to 90% (op.)
(op. and nonop.)		5% to 95% (nonop.)
Relative humidity
gradient		30% per hour max
Wet bulb temperature
(°C max)		29.4 (op.), 40.0 (nonop.)
Altitude, operating	–60.96 m to 3,048 m (–200 ft to 10,000+ ft)