Table 1: | Specifications (Continued) |
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Drive specification | ST94811AB | ||
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22 (typical); 26 (max) | |||
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Seek power (typical) | 2.4 watts | ||
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Read/write power (typical) | 2.4 watts | ||
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Idle, performance mode (typical) | 2.5 watts | ||
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Standby mode |
| 0.36 watts (typical)** | |
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Sleep mode |
| 0.36 watts (typical)** | |
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Voltage tolerance (including noise) | 5V ± 5% | ||
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Ambient temperature | 5° to 55°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 (noncondensing) | 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) | 33°C (operating) | ||
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| 40°C (nonoperating) | |
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Altitude, operating | |||
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Altitude, nonoperating (below mean sea level, max) | |||
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Shock, operating (Gs max at 2 msec) | 225 | ||
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Shock, nonoperating (Gs max at 2 msec) | 800 | ||
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Shock, nonoperating (Gs max at 1 msec) | 800 | ||
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Shock, nonoperating (Gs max at 0.5 msec) | 400 | ||
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Vibration, operating (max displacement may apply below 10 | 1.0 Gs (0 to peak, | ||
hz) |
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Vibration, nonoperating (max displacement may apply below | 5.0 Gs | ||
22 hz) |
| (0 to peak, | |
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Drive acoustics, sound power (bels) |
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Idle* |
| 2.3 (typical) | |
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| 2.5 (max) | |
Performance seek | 3.0 (typical) | ||
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| 3.2 (max) | |
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Nonrecoverable read errors | 1 per 1014 bits read | ||
Mean time between failures | 500,000 hours at 25°C ambient temperature | ||
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| 8,760 Power On Hours/year at nominal power. | |
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| Max case temperature: 40°C | |
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Load/Unload (U/UL) cycles |
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25°C, 50% relative humidity | 300,000 | ||
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| 20,000 hard power on/off cycles | |
32°C, 80% relative humidity | 100,000 | ||
5°C, 80% relative humidity | |||
20,000 hard power on/off cycles | |||
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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Warranty |
| 1 year | |
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*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.
**Typical notebooks will pull power to the drive when entering S3 and S4; while in the S3 and S4 states, drive sleep and drive standby modes will not contribute to battery power consumption.
4 | Momentus Blade Server Product Manual, Rev. B |
