Table 2: | Drive specifications summary for 500 and 250 Gbyte models | ||
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Drive specification | ST3500410SV | ST3250311SV | |
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Formatted capacity (512 bytes/sector)* | 500 Gbytes | 250 Gbytes | |
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Guaranteed sectors | 976,773,168 | 488,397,168 | |
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Heads |
| 2 | 1 |
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Disks |
| 1 |
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Bytes per sector | 512 |
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Default sectors per track | 63 |
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Default read/write heads | 16 |
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Default cylinders | 16,383 |
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Recording density | 1,474 kbits/in max |
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Track density |
| 236 ktracks/in avg |
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Areal density |
| 345 Gbits/in2 avg |
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Internal data transfer rate | 1,628 Mbits/sec max |
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Sustained data transfer rate | 140 Mbytes/sec max |
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I/O | 300 Mbytes/sec max |
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ATA | PIO modes |
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| Multiword DMA modes |
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| Ultra DMA modes |
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Cache buffer |
| 16 Mbytes | 8 Mbytes |
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Height (max) |
| 26.1 mm (1.028inches) | 20.20 mm (0.794 inches) |
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Width (max) |
| 101.85 mm (4.010 inches) |
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Length (max) |
| 146.99 mm (5.787 inches) |
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Weight (typical) | 544 grams (1.199 lb.) | 380 grams (0.838 lb.) | |
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<10 sec max | <8 sec max | ||
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<0.5 msec typical read; | <1.0 msec typical read; | ||
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| <1.5 msec typical write | <1.2 msec typical write |
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Average seek, read | <8.5 msec typical |
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Average seek, write | <9.5 msec typical |
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Startup current (typical) 12V (peak) | 2.0 amps |
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Voltage tolerance (including noise) | 5V ± 5% |
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| 12V ± 10% |
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Operating temperature (Drive Case) | 0° to 70°C |
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Nonoperating temperature |
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(Drive Case) |
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Temperature gradient (max) | 20°C per hour max (operating) |
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| 30°C per hour max (nonoperating) |
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Relative humidity | 5% to 90% (operating) |
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| 5% to 95% (nonoperating) |
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Relative humidity gradient | 30% per hour max |
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Wet bulb temperature (max) | 37.7°C max (operating) |
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| 40.0°C max (nonoperating) |
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Altitude, operating |
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Altitude, nonoperating |
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(below mean sea level, max) |
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Operational Shock | 63 Gs at 2 msec max |
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300 Gs at 2 msec max | 350 Gs at 2 msec max | ||
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Vibration, operating |
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6 | SV35.5 Series SATA Product Manual, Rev. C |