Seagate ST300MP0004 Savvio 15K.2 SAS Product Manual - Page 31
Notify Spinup primitive.
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Table 3: 73GB models DC power requirements Notes 3.0 Gbit mode (Amps) (Amps) 6.0 Gbit mode (Amps) (Amps) Voltage +5V +12V [2] +5V +12V [2] Regulation [5] ±5% ±5% [2] ±5% ±5% [2] Avg idle current DC [1] [7] 0.36 0.18 0.37 0.18 Maximum starting current (peak DC) DC 3σ [3] 0.51 1.09 0.51 1.08 (peak AC) AC 3σ [3] 0.93 1.73 0.99 1.86 Delayed motor start (max) DC 3σ [1] [4] 0.56 0.06 0.57 0.05 Peak operating current: (random read) Typical DC [1] [6] 0.45 0.36 0.46 0.36 Maximum DC 3σ [1] 0.47 0.37 0.48 0.37 Maximum (peak) DC 3σ 1.16 1.16 1.14 1.16 Peak operating current: (random write) Typical DC [1] 0.52 0.28 0.53 0.28 Maximum DC 3σ [1] 0.55 0.28 0.56 0.28 Maximum (peak) DC 3σ 1.14 1.18 1.16 1.20 Peak operating current: (sequential read) Typical DC [1] 0.88 0.18 0.89 0.18 Maximum DC 3σ [1] 0.92 0.19 0.93 0.19 Maximum (peak) DC 3σ 1.18 0.40 1.20 0.42 Peak operating current: (sequential write) Typical DC [1] 0.88 0.18 0.89 0.18 Maximum DC 3σ [1] 0.94 0.19 0.95 0.19 Maximum (peak) DC 3σ 1.16 0.40 1.18 0.40 [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, 35 Degrees C ambient. [2] For +12 V, a -10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 15k RPM. 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 1. [4] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive. [5] See paragraph 7.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response. [6] Operating condition is defined as random 8 block reads. [7] During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track. Savvio 15K.2 SAS Product Manual, Rev. G 23