Seagate ST3250823AS, ST3250310ASIM, ST3200826AS manual Drive specifications for 400 Gbyte models

Table 1:	Drive specifications for 400 Gbyte models
Drive specification		ST3400832AS	ST3400632AS
Formatted Gbytes (512 bytes/sector)*		400
Guaranteed sectors		781,422,768
Bytes per sector		512
Default sectors per track		63
Default read/write heads		16
Default cylinders		16,383
Recording density in BPI (bits/inch max)		763,000
Track density TPI (tracks/inch avg)		120,000
Areal density (Mbits/inch2 avg)		91,560
Spindle speed (RPM)		7,200
Internal data transfer rate (Mbytes/sec max)		95
Sustained transfer rate OD (Mbytes/sec)		65
I/O data transfer rate (Mbytes/sec max)		150
ATA data-transfer modes supported		PIO modes 0–4
		Multiword DMA modes 0–2
		Ultra DMA modes 0–6
SATA data-transfer modes supported		1.5 Gbits/sec
Cache buffer		8 Mbytes	16 Mbytes
Height (max)		26.11 mm (1.028 inches)
Width (max)		101.85 mm (4.010 inches)
Length (max)		146.99 mm (5.787 inches)
Weight (max) grams / lb.		635 / 1.39
Average latency (msec)		4.16
Power-on to ready (typical)		10 sec
Standby to ready (typical)		10 sec
Track-to-track seek time (msec typical)		0.8 (read), 1.0 (write)
Average seek, read (msec typical)		8.0
Average seek, write (msec typical)		9.0
Startup current (typical) 12V (peak)		2.8 amps
Voltage tolerance		5V ± 5%
(including noise)		12V ± 10%
Ambient temperature		0° to 60°C (op.)
		–40° to 70°C (nonop.)
Temperature gradient		20°C (operating)
(°C per hour max)		30°C (nonoperating)
Relative humidity		5% to 90% (operating)
		5% to 95% (nonoperating)
Relative humidity gradient		30% per hour max

4 Barracuda 7200.8 Serial ATA Product Manual, Rev. F