Seagate BARRACUDA ST3500830AS - Manual (Page 20)

14 Barracuda 7200.10 Serial ATA Product Manual, Rev. J
Table 6: Drive specifications summary for 250 Gbyte models
Drive specification ST3250620AS ST3250820AS ST3250410AS ST3250310AS
Formatted capacity (512 bytes/sector)* 250 Gbytes
Guaranteed sectors 488,397,168
Heads 3 2
Discs 2 1
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density 769 kbits/in avg 1,049 kbits/in avg
Track density 141 ktracks/in avg 155 ktracks/in avg
Areal density 109 Gbits/in 2 avg 163 Gbits/in 2 avg
Spindle speed 7,200 RPM
Internal data transfer rate 1,030 Mbits/sec max 1,212 Mbits/sec max
Sustained data transfer rate OD (read) 72 Mbytes/sec max 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 16 Mbytes 8 Mbytes 16 Mbytes 8 Mbytes
Height (max) 26.1 mm (1.028 inches) 19.99 mm (.787 inches)
Width (max) 101.85 mm (4.010 inches)
Length (max) 146.99 mm (5.787 inches)
Weight (typical) 600 grams (1.32 lb.) 380 grams (0.838lb.)
Average latency 4.16 msec
Power-on to ready 11 sec max 7.9 sec max
Standby to ready 11 sec max 7.9 sec max
Track-to-track seek time <0.8 msec typical read,
<1.0 msec typical write
<0.8 msec typical read,
<1.0 msec typical write
Average seek, read <8.5 msec typical <11.0 msec typical
Average seek, write <10.0 msec typical <12.0 msec typical
Startup current (typical) 12V (peak) 2.8 amps 2.0 amps
Voltage tolerance (including noise) 5V ± 5%
12V ± 10%
Ambient temperature 0° to 60°C per hour max (operating)
–40° to 70°C per hour max (nonoperating)
Temperature gradient 20°C (operating)
30°C (nonoperating)
Relative humidity 5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature 37.7°C max (operating)
37.7°C max (nonoperating)
Altitude, operating –60.96 m to 3,048 m
(–200 ft. to 10,000+ ft.)
Altitude, nonoperating
(below mean sea level, max)
–60.96 m to 12,192 m
(–200 ft. to 40,000+ ft.)
Operational Shock 68 Gs max at 2 msec 63 Gs max at 2 msec
Non-Operational Shock 350 Gs max at 2 msec