Seagate ST940813AM Specifications for 20 Gbyte models, Drive specification ST920813AM ST920814AM

Table 2:	Specifications for 20 Gbyte models
Drive specification		ST920813AM	ST920814AM
		(OEM)	(Aftermarket)
Formatted (512 bytes/sector)*		20 Gbytes
Guaranteed sectors		39,070,080
Bytes per sector		512
Physical read/write heads		1
Discs		1
Cache		8 Mbytes
Recording density, BPI		540.1k bits/inch at ID
Track density. TPI		119k tracks/inch at ID
Areal density		64.3 Gbits/inch2 at ID
Spindle speed		5,400 RPM
Internal data transfer rate		321.1 Mbits/sec max
I/O data transfer rate		100 Mbytes/sec
ATA data-transfer modes supported		PIO modes 0–4; Multiword DMA modes 0–2; Ultra DMA modes 0–5
Height		9.5 +/-0.2 mm (0.374 +/-.008 inches)
Width		69.85 +/-0.25 mm (2.750 +/-0.010 inches)
Length		100.2 +/-0.25 mm (3.945 +/-0.010 inches)
Weight		100 grams (0.22 lb) (typical)
Average latency		5.6 msecs
Power-on to ready
-20 to 85°C)		3.0 seconds (typical)
-30 to -20°C		15 seconds (typical)
3 sigma maximum at extreme temperature		30 seconds
Standby to ready
-20 to 85°C		3.0 seconds (typical)
-30 to -20°C		15 seconds (typical)
3 sigma maximum at extreme temperature		30 seconds
Track-to-track seek time		1.0 msec (read, typical), 1.5 msec (write, typical)
Average seek time		12.5 msec (typical)
Average seek, read		12.5 msec (typical)
Average seek, write		14.5 msec (typical)
Full-stroke seek		22 msec (typical); 24 msec (max)
Startup current 5V		1.1 amps (typical)
Seek power		1.90 watts / 0.38 amps (typical)
Read power		1.90 watts / 0.38 amps (typical)
Write power		1.70 watts / 0.34 amps (typical)
Idle mode		0.99 watts / 0.20 amps (typical)
Standby mode		0.26 watts / 0.05 amps (typical)***
Sleep mode		0.26 watts / 0.05 amps (typical)***
Voltage tolerance (including noise)		5V ± 5%
Ambient temperature
Operating		-30° to 85°C (OEM); -20° to 75°C (aftermarket);
Nonoperating		–40° to 95°C (OEM and aftermarket)
Temperature gradient		3°C per minute, noncondensing (operating)
		3°C per minutes, max, noncondensing (nonoperating)
Relative humidity (noncondensing)		5% to 90% (operating)
		5% to 95% (nonoperating)
Relative humidity gradient		30% per hour max

6 EE25 Series Product Manual, Rev. E