Seagate BARRACUDA ST31000528AS User Manual download pdf (Page 14)

8 Barracuda 7200.12 Serial ATA Product Manual, Rev. G

Table 3: Drive specifications summary for 250GB models

Drive specification ST3250318AS ST3160318AS

Formatted capacity (512 bytes/sector)* 250GB 160GB

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.) 1413kb/in

Track density (avg.) 236 ktracks/in

Areal density (avg.) 329Gb/in

Spindle speed 7200 RPM

Internal data transfer rate (max.) 1695Mb/s

Sustained data transfer rate OD (max.) 125MB/s

I/O data-transfer rate 300MB/s

ATA data-transfer modes supported PIO modes: 0 to 4

Multiword DMA modes: 0 to 2

Ultra DMA modes: 0 to 6

Cache buffer 8MB

Height (max.) 19.98mm / 0.787 in

Width (max.) 101.6mm / 4.0 in ( + 0.010 in)

Length (max.) 146.99mm / 5.787 in

Weight (typical) 415g / 0.915 lb

Average latency 4.16ms

Power-on to ready (max.) <8.5s

Standby to ready (max.) <8.5s

Track-to-track seek time (typical) <1.0ms (read)

<1.2ms (write)

Average seek, read (typical)

Average seek, write (typical)

<8.5ms (read)

<9.5ms (write)

Startup current (typical) 12V (peak) 2.0A

Voltage tolerance (including noise) 5V +10% / -7.5%

12V +10% / -7.5%

Ambient temperature 0° to 60°C (operating)

–40° to 70°C (non-operating)

Temperature gradient (max.) 20°C per hour (operating)

30°C per hour (non-operating)

Relative humidity 5% to 95% (operating)

5% to 95% (non-operating)

Relative humidity gradient (max.) 30% per hour

Wet bulb temperature 37.7°C max (operating)

40.0°C max (non-operating)

Altitude, operating –60.96m to 3,048m

(–1000 ft to 10,000+ ft)

Altitude, non-operating

(below mean sea level, max.)

–60.96m to 12,192m

(–1000 ft to 40,000+ ft)

Operational Shock (max.) 70 Gs at 2ms

Non-Operational Shock (max.) 350 Gs at 2ms

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 47 48

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Seagate BARRACUDA ST31000528AS User Manual Page 14

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