Seagate ST9600005SS Savvio 10K.3 SAS Product Manual - Page 31
Notify Spinup primitive.
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Table 3: 146GB standard model DC power requirements 146GB standard model 3.0 Gbit mode 146GB standard model 6.0 Gbit mode Notes (Amps) (Amps) (Amps) (Amps) Voltage +5V +12V [2] +5V +12V [2] Regulation [5] ±5% ±5% [2] ±5% ±5% [2] Avg idle current DC [1] [7] 0.35 0.14 0.36 0.14 Maximum starting current (peak DC) DC 3σ [3] 0.52 1.18 0.53 1.19 (peak AC) AC 3σ [3] 0.77 2.30 0.82 1.93 Delayed motor start (max) DC 3σ [1] [4] 0.56 0.04 0.57 0.06 Peak operating current (random read): Typical DC [1] [6] 0.45 0.36 0.48 0.33 Maximum DC 3σ [1] 0.48 0.36 0.52 0.33 Maximum (peak) DC 3σ 1.08 1.18 1.14 1.16 Peak operating current (random write) Typical DC 0.50 0.26 0.53 0.24 Maximum DC 3σ 0.52 0.27 0.56 0.25 Maximum (peak) DC 3σ 0.98 1.18 1.06 1.18 Peak operating current (sequential read) Typical DC 0.85 0.16 0.87 0.13 Maximum DC 3σ 0.88 0.16 0.92 0.14 Maximum (peak) DC 3σ 1.12 0.28 1.16 0.26 Peak operating current (sequential write) Typical DC 0.80 0.16 0.83 0.13 Maximum DC 3σ 0.83 0.16 0.87 0.14 Maximum (peak) DC 3σ 1.00 0.30 1.06 0.28 [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 9,936 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 17. [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 10K.3 SAS Product Manual, Rev. H 23