Seagate ST3250312CS manual Drive specifications summary for 250 and 160GB models, ST3250412CS

Table 3:	Drive specifications summary for 250 and 160GB models
Drive specification		ST3250412CS	ST3250312CS	ST3160316CS
Formatted capacity		250GB		160GB
(512 bytes/sector)*
Guaranteed sectors		488,397,168		312,581,808
Heads		1
Disks		1
Bytes per sector		512
Default sectors per track		63
Default read/write heads		16
Default cylinders		16,383
Recording density (max.)		1417kb/in
Track density (avg.)		236 ktracks/in
Areal density (avg.)		341.5Gb/in2
Spindle speed		5900 RPM
Internal data transfer rate (max.)		1285Mb/s
Sustained data transfer rate (max.)		120MB/s
I/O data-transfer rate (max.)		300MB/s
ATA data-transfer modes supported		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–6
Cache buffer		16MB	8MB
Height (max.)		20.20mm / 0.795 in
Width (max.)		101.85mm / 4.010 in
Length (max.)		146.99mm / 5.787 in
Weight (typical)		395g / 0.871 lb
Average latency		5.1ms
Power-on to ready (typical)		<6s
Standby to ready (typical)		<6s
Track-to-track seek time (typical)		<1.0ms (read)
		<1.2ms (write)
Average seek (typical)		<14.0ms (read)
		<15.0ms (write)
Startup current (typical) 12V (peak)		2.0A
Voltage tolerance (including noise)		5V ± 5%
		12V ± 10%
Operating temperature		0° to 75°C
(drive case temperature)
Non-operating temperature (ambient)		–40° to 70°C
Temperature gradient (max.)		20°C per hour (operating)
		30°C per hour (non-operating)
Relative humidity		5% to 90% (operating)
		5% to 95% (non-operating)
Relative humidity gradient (max.)		30% per hour
Wet bulb temperature (max.)		37.7°C (operating)
		40.0°C (non-operating)
Altitude, operating		–60.96m to 3,048m
		(–200 ft to 10,000+ ft)
Altitude, non-operating		–60.96m to 12,192m
(below mean sea level, max.)		(–200 ft to 40,000+ ft)

8 Pipeline HD.2 Series SATA Product Manual, Rev. E