Seagate ST800FM0012 Pulsar.2 SAS Product Manual - Page 36

Table 12: Parameter Regulation Voltage 100GB standard model DC power requirements 100GB (6.0Gb) ±5% +5V Current (A) ±5% +12V Current (A) 0.12 Power (W) 3.59 Average idle current Maximum starting current (peak DC) DC (peak AC) AC Delayed start (max) DC Peak operating current (random read): Typical DC Maximum DC Maximum (peak) DC Peak operating current (random write) Typical DC Maximum DC Maximum (peak) DC Peak operating current (sequential read) Typical DC Maximum DC Maximum (peak) DC Peak operating current (sequential write) Typical DC Maximum DC Maximum (peak) DC DC 0.43 3σ 3σ 3σ 0.48 1.53 0.45 0.32 0.61 0.13 2.38 DC 3σ 3σ 0.50 0.51 0.88 0.18 0.20 0.47 4.66 4.95 DC 3σ 3σ 0.49 0.51 0.80 0.36 0.39 0.89 6.77 7.23 DC 3σ 3σ 0.56 0.59 0.89 0.26 0.29 0.56 5.92 6.43 DC 3σ 3σ 0.50 0.52 0.83 0.35 0.38 0.94 6.70 7.16 [1] [2] [3] [4] [5] [6] Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these values. Power supply at nominal voltage. N (number of drives tested) = 6, 60 Degrees C ambient. For +12 V, a -10% tolerance is allowed during initial start but must return to ±5% before reaching ready state. The ±5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator. See +12V current profile in Figure 6 (for 400GB models) and Figure 7 (for 200GB models). See +12V current profile in Figure 8 (for 100GB models). This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive. See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response. 28 Pulsar.2 SAS Product Manual, Rev. B