Average seek time msec typical 12.5 | Seagate ST9120821A, ST98823A

Table 1:	Specifications

Drive specification		ST9120821A	ST9100824A	ST98823A	ST96812A	ST94813A	ST93811A

Average seek time (msec typical)		12.5

Average seek, read (msec typical)		12.5

Average seek, write (msec typical)		14.5

Full-stroke seek (msec)		22 (typical); 24 (max)

Seek power (typical)		2.0 watts

Read/write power (typical)		Read: 1.8 watts; Write: 1.8 watts

Idle mode (typical, low power)		0.80 watts

Standby mode		0.26 watts (typical)**

Sleep mode		0.26 watts (typical)**

Voltage tolerance		5V ± 5%
(including noise)

Ambient temperature		5° to 55°C (operating), –40° to 70°C (nonoperating)

Temperature gradient		20°C (operating)
(°C per hour max,		30°C (nonoperating)
noncondensing)

Relative humidity		5% to 90% (operating)
(noncondensing)		5% to 95% (nonoperating)

Relative humidity gradient		30% per hour max

Wet bulb temperature (°C max)		30°C (operating)
		40°C (nonoperating)

Altitude, operating		–304.8 m to 3,048 m (–1000 ft to 10,000 ft)

Altitude, nonoperating		–304.8 m to 12,192 m (–1,000 ft to 40,000 ft)
(below mean sea level, max)		–304.8 m to 12,192 m (–1,000 ft to 40,000 ft)
(below mean sea level, max)

Shock, operating		250
(Gs max at 2 msec)		250
(Gs max at 2 msec)

Shock, nonoperating		800
(Gs max at 2 msec)		800
(Gs max at 2 msec)

Shock, nonoperating		900
(Gs max at 1 msec)		900
(Gs max at 1 msec)

Shock, nonoperating		400
(Gs max at 0.5 msec)		400
(Gs max at 0.5 msec)

Vibration, operating
(max displacement may		1.0 Gs (0 to peak, 5–500 Hz)
apply below 10 hz)

Vibration, nonoperating
(max displacement may apply		5.0 Gs (0 to peak, 10–500 Hz)
below 22 hz)

Drive acoustics, sound power
(bels), 2 disc
Idle*		2.4 (typical)
Idle*		2.6 (max)
		2.6 (max)
Performance seek		2.9 (typical)
Performance seek		3.1 (max)
		3.1 (max)

Nonrecoverable read errors		1 per 1014 bits read
Annualized Failure Rate (AFR)		0.73%

Load/Unload (U/UL) cycles
25°C, 50% relative humidity		600,000 software-controlled power on/off cycles
32°C, 80% relative humidity		20,000 hard power on/off cycles
32°C, 80% relative humidity
5°C, 80% relative humidity		600,000 software-controlled power on/off cycles
5°C, 10% relative humidity		20,000 hard power on/off cycles
55°C, 16% relative humidity

4	Momentus 5400.2 PATA Product Manual, Rev. B

Specifications

Average seek time (msec typical)

12.5

Momentus 5400.2 PATA Product Manual, Rev. B