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4 SV35.5 Series SATA Product Manual, Rev. C
Table 1: Drive specifications summary for 1 Tbyte models
Drive specification ST31000525SV
Formatted capacity (512 bytes/sector)* 1 Tbyte
Guaranteed sectors 1,953,525,168
Heads 4
Disks 2
Bytes per sector 512
Default sectors per track 63
Default read/write heads 16
Default cylinders 16,383
Recording density 1,474 kbits/in max
Track density 236 ktracks/in avg
Areal density 345 Gbits/in
2
avg
Internal data transfer rate 1,628 Mbits/sec max
Sustained data transfer rate 140 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) 26.11 mm (1.028 inches)
Width (max) 101.85 mm (4.010 inches)
Length (max) 146.99 mm (5.787 inches)
Weight (typical) 677 grams (1.493 lb.)
Power-on to ready <10 sec max
Track-to-track seek time <0.5 msec typical read;
<1.5 msec typical write
Average seek, read <8.5 msec typical
Average seek, write <9.5 msec typical
Startup current (typical) 12V (peak) 2.0 amps
Voltage tolerance (including noise) 5V ± 5%
12V ± 10%
Operating temperature (Drive Case) 0° to 70°C
Nonoperating temperature
(Drive Case)
–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.)
Operational Shock 63 Gs at 2 msec max
Non-Operational Shock 300 Gs at 2 msec max
Vibration, operating 5-22 Hz: 0.25 Gs, Limited displacement
22-350 Hz: 0.50 Gs
350-500 Hz: 0.25 Gs