Table 1: | Specifications |
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Drive specification | ST9120821AB | ST9100824AB | ST98823AB | ST96812AB | ST94813AB | |
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Average seek, read (msec typical) | 12.5 |
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Average seek, write (msec typical) | 14.5 |
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22 (typical); 24 (max) |
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Seek power (typical) | 2.0 watts |
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Read/write power (typical) | Read: 1.8 watts |
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Write: 1.8 watts |
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Idle mode (typical) | 0.80 watts |
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Standby mode |
| 0.26 watts (typical)** |
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Sleep mode |
| 0.26 watts (typical)** |
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Voltage tolerance | 5V ± 5% |
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(including noise) |
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Ambient temperature | 5° to 55°C (operating) |
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Temperature gradient | 20°C (operating) |
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(°C per hour max, noncondensing) | 30°C (nonoperating) |
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Relative humidity | 5% to 90% (operating) |
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(noncondensing) | 5% to 95% (nonoperating) |
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Relative humidity gradient | 30% per hour max |
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Wet bulb temperature (°C max) | 30°C (operating) |
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40°C (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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Shock, operating (Gs max at 2 msec) | 250 |
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Shock, nonoperating | 800 |
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(Gs max at 2 msec) |
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Shock, nonoperating | 900 |
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(Gs max at 1 msec) |
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Shock, nonoperating | 400 |
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(Gs max at 0.5 msec) |
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Vibration, operating |
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(max displacement may | 1.0 Gs (0 to peak, |
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apply below 10 hz) |
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Vibration, nonoperating |
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(max displacement may apply below | 5.0 Gs (0 to peak, |
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22 hz) |
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Drive acoustics, sound power (bels) |
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Idle*** |
| 2.4 (typical) |
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| 2.6 (max) |
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Performance seek | 2.9 (typical) |
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3.1 (max) |
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Nonrecoverable read errors | 1 per 1014 bits read |
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Annualized Failure Rate (AFR) | 1.74% at maximum case temperature of 40°C and 8,760 power on hours (POH) | |||||
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Load/Unload (U/UL) cycles |
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25°C, 50% relative humidity | 600,000 |
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| 20,000 hard power on/off cycles |
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32°C, 80% relative humidity | 600,000 |
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5°C, 80% relative humidity | 20,000 hard power on/off cycles |
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5°C, 10% relative humidity |
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55°C, 16% relative humidity |
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Service life |
| 5 Years |
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4 | Momentus 5400.2 Blade Server Product Manual, Rev. B |