(3)Current Requirements and Power Dissipation Table 1.3 lists the current and power dissipation.
Table 1.3 Current and power dissipation
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| Typical RMS current (*1) [mA] |
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Mode of Operation |
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| Typical Power (*2) | [watts] | ||
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| +12 V |
| +5 V | |||||
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Model |
| MPG | MPG | MPG | All | MPG | MPG |
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Spin up |
| 1950 peak | 1950 peak | 1950 peak | 800 peak | 27.4 | 27.4 |
| 27.4 |
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Idle (Ready) (*3) |
| 350 | 400 | 400 | 490 | 6.7 | 7.3 |
| 7.3 |
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R/W (On Track) (*4) |
| 370 | 450 | 450 | 600 | 7.4 | 8.4 |
| 8.4 |
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Seek (Random) (*5) |
| 480 | 540 | 540 | 570 | 8.6 | 9.3 |
| 9.3 |
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Standby |
| 18 | 18 | 18 | 120 | 0.8 | 0.8 |
| 0.8 |
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Sleep |
| 18 | 18 | 18 | 120 | 0.8 | 0.8 |
| 0.8 |
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| Energy efficiency (rank) (*6) [watt / GB] |
| 0.327 (A) | 0.237 (B) |
| 0.178 (B) | |||
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*1 Current is typical rms except for spin up.
*2 Power requirements reflect nominal values for +12V and +5V power.
*3 Idle mode is in effect when the drive is not reading, writing, seeking, or executing any commands. A portion of the R/W circuitry is powered down, the spindle motor is up to speed and the Drive ready condition exists.
*4 R/W mode is defined as 50% read operations and 50% write operations on a single physical track.
*5 Seek/W/R mode is defined as 33% seek operations, 33% write operations, and 33% read operations.
*6 Energy efficiency based on the Law concerning the Rational Use of Energy indicates the value obtained by dividing power consumption by the storage capacity. (Japan only)
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