Seagate ST3250312CS, ST3250412CS, ST3500414CS manual Drive specifications summary for 1000GB models

Table 1:	Drive specifications summary for 1000GB models
Drive specification		ST31000424CS		ST31000322CS
Formatted Capacity		1000GB
(512 bytes/sector)*
Guaranteed sectors		1,953,525,168
Heads		4
Disks		2
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 to4
		Multiword DMA modes: 0 to2
		Ultra DMA modes: 0 to 6
Cache buffer		16MB		8MB
Height (max.)		26.1mm / 1.028 in
Width (max.)		101.85mm / 4.010 in
Length (max.)		146.99mm / 5.787 in
Weight (typical)		615g / 1.356 lb
Average latency		5.1ms
Power-on to ready (typical)		<12s
Standby to ready (typical)		<12s
Track-to-track seek time (typical)		<1.0ms ( read)
		<1.2ms ( write)
Average seek (typical)		<14.0ms read
		<15.0ms write
Startup current 12V-peak (typical)		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 )

4 Video 3.5 HDD Product Manual, Rev. J