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SEAGATE ENTERPRISE PERFORMANCE 15K HDD AND ENTERPRISE TURBO SSHD SAS PRODUCT MANUAL, REV. B 21
[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 sele ction
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 6.3.1, "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 maxi mum
track.
Table 4 600GB models DC power requirements
Notes
600GB Base - Hybrid
3.0 Gb mode
6.0 Gb mode
Parameter (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] 0.34 0.30 0.34 0.30
Advanced Idle Current
Idle1 3σ 0.39 0.33 0.39 0.33
Idle2 3σ 0.28 0.27 0.29 0.27
Idle3 3σ 0.28 0.14 0.28 0.14
Standby 3σ 0.26 0.01 0.27 0.01
Maximum Start current
DC (peak DC) 3σ [3] 0.73 0.97 0.73 0.96
AC (peak AC) 3σ [3] 0.89 1.58 0.90 1.56
Delayed motor start (max) DC 3σ [1] [4] 0.27 0.01 0.27 0.01
Peak operating current: (random read)
Typical DC [1] [6] 0.44 0.52 0.44 0.52
Maximum DC 3σ [1] 0.48 0.54 0.49 0.54
Maximum (peak) DC 3σ 1.96 1.57 1.93 1.58
Peak operating current: (random write)
Typical DC [1] 0.42 0.48 0.42 0.48
Maximum DC 3σ [1] 0.47 0.51 0.47 0.50
Maximum (peak) DC 3σ 1.13 1.55 1.05 1.54
Peak operating current: (sequential read)
Typical DC [1] 0.78 0.32 0.80 0.32
Maximum DC 3σ [1] 0.84 0.34 0.86 0.34
Maximum (peak) DC 3σ 1.15 0.82 1.04 0.78
Peak operating current: (sequential write)
Typical DC [1] 0.64 0.36 0.65 0.36
Maximum DC 3σ [1] 0.72 0.40 0.73 0.40
Maximum (peak) DC 3σ 0.90 0.81 0.86 0.80