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4 Barracuda LP Series SATA Product Manual, Rev. A
Table 1: Drive specifications summary for 2000 and 1500 Gbyte models
Drive specification ST32000542AS ST31500541AS ST31000520AS
Formatted capacity
(512 bytes/sector)*
2000 Gbytes 1500 Gbytes 1000 Gbytes
Guaranteed sectors 3,907,029,168 2,930,277,168 1,953,525,168
Heads 8 4
Discs 4 2
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density 1417 kbits/in max
Track density 236 ktracks/in avg
Areal density 341.5 Gbits/in
2
avg
Spindle speed 5,900 RPM
Internal data transfer rate 1285 Mbits/sec max
Sustained data transfer rate OD 95 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 32 Mbytes
Height (max) 26.1 mm (1.028 inches)
Width (max) 101.85 mm (4.010 inches)
Length (max) 146.99 mm (5.787 inches)
Weight (typical) 655 grams (1.444 lb.) 622 grams (1.371 lb.)
Average latency 5.1 msec
Power-on to ready <13 sec typical <8 sec typical
Standby to ready <8 sec typical <6 sec typical
Track-to-track seek time <1.0 msec typical read;
<1.2 msec typical write
Average read <16.0 msec typical
Average write <16.0 msec typical
Startup current 12V (peak) 2.8 amps 2.0 amps
Voltage tolerance (including noise) 5V ± 5%
12V ± 10%
Operating temperature
(Drive Case temperature)
0° to 60°C
Nonoperating temperature (Ambient) –40° to 70°C
Temperature gradient (max) 20°C per hour max (operating)
30°C per hour max (nonoperating)
Relative humidity 5% to 90% (operating)
5% to 95% (nonoperating)
Relative humidity gradient 30% per hour max
Wet bulb temperature (max) 37.7°C max (operating)
40.0°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.)