Seagate ST400FX0002 Pulsar XT.2 SAS Product Manual - Page 33

Table 10: 100GB standard model DC power requirements Parameter 100GB (6.0Gb) Regulation ±5% ±5% Voltage +5V +12V Average idle current DC Current (A) 0.40 Current (A) 0.17 Power (W) 4.04 Maximum starting current (peak DC) DC 3σ 1.09 0.31 (peak AC) AC Delayed start (max) DC 3σ 1.16 3σ 0.43 0.73 0.18 4.31 Peak operating current (random read): Typical DC Maximum DC Maximum (peak) DC DC 0.46 3σ 0.49 3σ 0.80 0.21 4.82 0.23 5.21 0.72 Peak operating current (random write) Typical DC DC 0.45 0.25 5.25 Maximum DC Maximum (peak) DC 3σ 0.49 3σ 0.71 0.26 5.57 0.54 Peak operating current (sequential read) Typical DC DC 0.54 0.28 6.06 Maximum DC Maximum (peak) DC 3σ 0.58 3σ 0.80 0.29 6.38 0.58 Peak operating current (sequential write) Typical DC Maximum DC DC 0.53 3σ 0.57 0.36 6.97 0.37 7.29 Maximum (peak) DC 3σ 0.82 0.82 [1] 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. [2] 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. [3] See +12V current profile in Figure 4 (for 400GB models) and Figure 5 (for 200GB models). [4] See +12V current profile in Figure 6 (for 100GB models). [5] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive. [6] See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response. Pulsar XT.2 SAS Product Manual, Rev. B 25