3.7Seek time
Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The specifications in the table below are defined as follows:
•
•Average seek time is a true statistical random average of at least 5000 measurements of seeks between random tracks, less overhead.
Table 2: Typical seek times
Typical seek times (ms) | Read |
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2.0 | |
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Average | 11.0 |
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Average latency | 4.20 |
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Note. These drives are designed to consistently meet the seek times represented in this manual. Physical seeks, regardless of mode (such as
3.8Start/stop times
Time to ready | Typical | Max @ 25°C |
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5.0 | 5.5 | |
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Standby to Ready (sec) | 3.5 | 4.0 |
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Note.
3.9Power specifications
The drive receives DC power (+5V) through a native SATA power connector.
3.9.1Power consumption
Power requirements for the drives are listed in the table on page 8. Typical power measurements are based on an average of drives tested, under nominal conditions, at 25°C ambient temperature.
•Spinup power
Spinup power is measured from the time of
•Seek mode
During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and does not execute a read or write operation. Servo electronics are active. Seek mode power is measured based on three random seek operations every 100 ms. This mode is not typical.
•Read/write power and current
Read/write power is measured with the heads on track, based on three 63 sector read or write operations every 100 ms.
8 | Momentus XT Product Manual, Rev. D |