7.3DC power requirements
The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector. Notes are shown following Table 5.
Table 2: DC power requirements for ST9900805FC model
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| Notes | (Amps) | (Amps) | (Amps) | (Amps) |
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Voltage |
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| +5V | +12V [2] | +5V | +12V [2] |
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Regulation |
| [6] | ±5% | ±5% [2] | ±5% | ±5% [2] |
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Avg idle current DC |
| [1] [8] | 0.36 | 0.24 | 0.38 | 0.24 |
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Advanced Idle Current |
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Idle_A | 3σ |
| 0.37 | 0.24 | 0.39 | 0.25 |
Idle_B | 3σ |
| 0.25 | 0.21 | 0.27 | 0.22 |
Idle_C | 3σ |
| 0.25 | 0.10 | 0.27 | 0.11 |
Standby | 3σ |
| 0.25 | 0.06 | 0.27 | 0.07 |
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Maximum starting current |
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(peak DC) DC | 3σ | [3] | 0.64 | 1.02 | 0.64 | 1.03 |
(peak AC) AC | 3σ | [3] | 0.99 | 1.67 | 0.92 | 1.70 |
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Delayed motor start (max) DC | 3σ | [1] [5] | 0.57 | 0.06 | 0.59 | 0.06 |
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Peak operating current (random read): |
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Typical DC |
| [1] [7] | 0.45 | 0.44 | 0.46 | 0.44 |
Maximum DC | 3σ | [1] | 0.46 | 0.46 | 0.47 | 0.46 |
Maximum (peak) DC | 3σ |
| 2.00 | 2.68 | 1.26 | 1.60 |
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Peak operating current (random write) |
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Typical DC |
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| 0.51 | 0.45 | 0.52 | 0.45 |
Maximum DC | 3σ |
| 0.52 | 0.50 | 0.54 | 0.53 |
Maximum (peak) DC | 3σ |
| 1.15 | 1.63 | 1.15 | 1.60 |
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Peak operating current (sequential read) |
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Typical DC |
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| 0.83 | 0.23 | 0.85 | 0.23 |
Maximum DC | 3σ |
| 0.85 | 0.24 | 0.86 | 0.24 |
Maximum (peak) DC | 3σ |
| 1.12 | 0.42 | 1.17 | 0.44 |
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Peak operating current (sequential write) |
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Typical DC |
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| 0.90 | 0.23 | 0.92 | 0.23 |
Maximum DC | 3σ |
| 0.93 | 0.24 | 0.95 | 0.24 |
Maximum (peak) DC | 3σ |
| 1.17 | 0.40 | 1.24 | 0.42 |
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Savvio 10K.5 FC Product Manual, Rev. D | 23 |
