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6 SV35.5 Series SATA Product Manual, Rev. C
Table 2: Drive specifications summary for 500 and 250 Gbyte models
Drive specification ST3500410SV ST3250311SV
Formatted capacity (512 bytes/sector)* 500 Gbytes 250 Gbytes
Guaranteed sectors 976,773,168 488,397,168
Heads 2 1
Disks 1
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 16 Mbytes 8 Mbytes
Height (max) 26.1 mm (1.028inches) 20.20 mm (0.794 inches)
Width (max) 101.85 mm (4.010 inches)
Length (max) 146.99 mm (5.787 inches)
Weight (typical) 544 grams (1.199 lb.) 380 grams (0.838 lb.)
Power-on to ready <10 sec max <8 sec max
Track-to-track seek time <0.5 msec typical read;
<1.5 msec typical write
<1.0 msec typical read;
<1.2 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 350 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