Seagate BARRACUDA ST3500830AS User Manual download pdf (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

avg 163 Gbits/in

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

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 67 68

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