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Table 2: | 4TB Drive DC power requirements |
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| 6.0Gb mode | |
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Voltage |
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| +5V | +12V | |
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Regulation |
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| ±5% | ±5% | |
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Avg Idle Current * |
| 0.27 | 0.27 | ||
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Advanced Idle Current * |
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| Idle_A |
| 0.182 | 0.282 |
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| Idle_B |
| 0.167 | 0.237 |
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| Idle_C |
| 0.167 | 0.104 |
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| Standby |
| 0.162 | 0.006 |
Average | Sleep Current |
| 0.162 | 0.006 | |
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Maximum Start Current |
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| DC (peak DC) | 3σ | 0.34 | 0.51 |
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| AC (peak DC) | 3σ | 0.71 | 1.73 |
Peak operating current (random read): |
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| Typical DC |
| 0.29 | 0.42 |
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| Maximum DC | 3σ | 0.29 | 0.42 |
Peak operating current (random write) |
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| Typical DC |
| 0.29 | 0.42 |
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| Maximum DC | 3σ | 0.29 | 0.42 |
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Peak operating current (sequential read) |
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| Typical DC |
| 0.48 | 0.30 |
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| Maximum DC | 3σ | 0.50 | 0.30 |
Peak operating current (sequential write) |
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| Typical DC |
| 0.40 | 0.32 |
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| Maximum DC | 3σ | 0.47 | 0.33 |
*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.
•Spinup power
Spinup power is measured from the time of
•Operating Read/Write power and current
Sequential read/write - 128 block transfer, QD=16, minimum 10 data points Random read/write - 8 block transfer, QD=16, minimum 10 data points Typical DC - average of average operating currents
Maximum DC - average of max operating currents
•Average Idle Current
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in a random track location.
•EPC Idle/Standby/Sleep mode
The current is measured in the desired EPC idle/standby state.
Seagate Terascale HDD Product Manual, Rev. B | 7 |
