Seagate DB35.4 Drive specifications summary for 250 Gbyte model, Drive specification ST3250310CS

Table 1:	Drive specifications summary for 250 Gbyte model
Drive specification		ST3250310CS
Formatted capacity (512 bytes/sector)*		250 Gbytes
Guaranteed sectors		488,397,168
Heads		2
Discs		1
Bytes per sector		512
Default sectors per track		63
Default read/write heads		16
Default cylinders		16,383
Recording density		1,049 kbits/in max
Track density		155 ktracks/in avg
Areal density		163 Gbits/in2 avg
Internal data transfer rate		1,212 Mbits/sec max
Sustained data transfer rate OD		106 Mbytes/sec max
I/O data-transfer rate		300 Mbytes/sec max
ATA data-transfer modes supported		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–6
Cache buffer		8 Mbytes
Height (max)		20.20 mm (0.794 inches)
Width (max)		101.6 mm (4.000 inches)
Length (max)		146.99 mm (5.787 inches)
Weight (typical)		382 grams (0.842 lb.)
Power-on to ready		16 sec max
Standby to ready		16 sec max
Track-to-track seek time		<1.0 msec typical read;
		<1.2 msec typical write
Average seek, read		<14.0 msec typical
Average seek, write		<15.0 msec typical
Startup current (typical) 12V (peak)		2.0 amps
Voltage tolerance (including noise)		5V ± 5%
		12V ± 10%
Operating temperature (Drive Case temperature)		0° to 75°C
Nonoperating temperature (Ambient)		–40° to 70°C
Temperature gradient (max)		20°C per hour max (operating)
		30°C per hour max (nonoperating)
Relative humidity		5% to 90% (operating)
		5% to 95% (nonoperating)
Relative humidity gradient		30% per hour max
Wet bulb temperature (max)		37.7°C max (operating)
		40.0°C max (nonoperating)
Altitude, operating		–60.96 m to 3,048 m
		(–200 ft. to 10,000+ ft.)
Altitude, nonoperating		–60.96 m to 12,192 m
(below mean sea level, max)		(–200 ft. to 40,000+ ft.)
Operational Shock		63 Gs at 2 msec max
Non-Operational Shock		350 Gs at 2 msec max
Vibration, operating		5–350 Hz: 0.50 Gs
		350–500 Hz:: 0.25 Gs

4 DB35.4 Series SATA Product Manual, Rev. C