Table 3: | Drive specifications summary for 80 and 40 Gbyte models |
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Drive specification | ST380811AS |
| ST380211AS | ST340211AS | |
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Formatted Gbytes (512 bytes/sector)* | 80 |
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| 40 | |
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Heads |
| 1 |
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Discs |
| 1 |
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Guaranteed sectors | 156,301,488 |
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| 78,165,360 | |
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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, KBPI (kbits/in max) | 756.09 |
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Track density, KTPI (ktracks/in avg.) | 141.95 |
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Areal density, (Gbits/in2 avg) | 103.8 |
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Spindle speed (RPM) | 7,200 |
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Internal data transfer rate (Mbits/sec max) | 867.2 |
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Sustained data transfer rate OD (Mbytes/sec max) | 80 |
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I/O | 300 |
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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 |
| 8 Mbytes |
| 2 Mbytes |
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Height (max) |
| 19.9 mm (0.787 inches) |
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Width (max) |
| 101.6 mm (4.000 inches) +/- 0.010 inches |
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Length (max) |
| 146.99 mm (5.787 inches) |
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Weight (max) |
| 365 grams (0.805 lb.) |
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Average latency (msec) | 4.16 |
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<10.0 sec |
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Standby to ready (sec max) | <10.0 sec |
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<0.8 (read), <1.0 (write) |
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Average seek time (msec typical) | <12.9 (read, <13.9 (write) |
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Voltage tolerance (including noise) | 5V ± 5% |
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| 12V ± 10% |
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Ambient temperature | 0° to 60°C (operating) |
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Temperature gradient (°C per hour max) | 20°C (operating) |
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| 30°C (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 (°C max) | 37.7 (operating) |
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| 40.0 (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 (Gs max at 2 msec) | 63 |
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350 Gs |
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Vibration, operating |
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8 | Barracuda 7200.9 Serial ATA Product Manual, Rev. C |
