Seagate BARRACUDA 9 Handbuch PDF herunterladen (Seite 14)

Barracuda 7200.9 Serial ATA Product Manual, Rev. C

Table 3: Drive specifications summary for 80 and 40 Gbyte models

Drive specification ST380811AS ST380211AS ST340211AS

Formatted Gbytes (512 bytes/sector)* 80 40

Heads 1

Discs 1

Guaranteed sectors 156,301,488 78,165,360

Bytes per sector 512

Default sectors per track 63

Default read/write heads 16

Default cylinders 16,383

Recording density, KBPI (kbits/in max) 756.09

Track density, KTPI (ktracks/in avg.) 141.95

Areal density, (Gbits/in

avg) 103.8

Spindle speed (RPM) 7,200

Internal data transfer rate (Mbits/sec max) 867.2

Sustained data transfer rate OD (Mbytes/sec max) 80

I/O data-transfer rate (Mbytes/sec max) 300

ATA data-transfer modes supported PIO modes 0–4

Multiword DMA modes 0–2

Ultra DMA modes 0–6

Cache buffer 8 Mbytes 2 Mbytes

Height (max) 19.9 mm (0.787 inches)

Width (max) 101.6 mm (4.000 inches) +/- 0.010 inches

Length (max) 146.99 mm (5.787 inches)

Weight (max) 365 grams (0.805 lb.)

Average latency (msec) 4.16

Power-on to ready (sec max) <10.0 sec

Standby to ready (sec max) <10.0 sec

Track-to-track seek time (msec typical) <0.8 (read), <1.0 (write)

Average seek time (msec typical) <12.9 (read, <13.9 (write)

Voltage tolerance (including noise) 5V ± 5%

12V ± 10%

Ambient temperature 0° to 60°C (operating)

–40° to 70°C (nonoperating)

Temperature gradient (°C per hour max) 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 (°C max) 37.7 (operating)

40.0 (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 (Gs max at 2 msec) 63

Non-Operational Shock (Gs max at 2 msec) 350 Gs

Vibration, operating 5–22 Hz: 0.25 Gs, Limited displacement

22–350 Hz: 0.5 Gs

350–500 Hz:: 0.25 Gs

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 49 50

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