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CHEETAH 15K.7 SAS PRODUCT MANUAL, REV. F 18
6.0 PHYSICAL/ELECTRICAL SPECIFICATIONS
This section provides information relating to the physical and electrical characteristics of the drive.
6.1 AC POWER REQUIREMENTS
None.
6.2 DC POWER REQUIREMENTS
The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector.
The standard drive models and the SED drive models have identical hardware, however the security and encryption portion
of the drive controller ASIC is enabled and functional in the SED models. This represents a small additional drain on the 5V
supply of about 30mA and a commensurate increase of about 150mW in power consumption. There is no additional drain on
the 12V supply.
Table 3 600 GB DC power requirements
NOTES
3 GBIT MODE 6 GBIT MODE
(AMPS)(AMPS)(AMPS)(AMPS)
Voltage +5V +12V [2] +5V +12V [2]
Regulation [5] ±5% ±5% [2] ±5% ±5% [2]
Avg idle current [1] [7] 0.37 0.81 0.38 0.81
Maximum starting current
(peak DC) DC 3σ [3] 0.67 1.90 0.68 1.91
(peak AC) AC 3σ [3] 0.98 3.82 0.98 3.88
Delayed motor start (max) DC 3σ [1] [4] 0.55 0.04 0.56 0.04
Peak operating current (random read):
Typical DC [1][6] [1] 0.44 1.15 0.45 1.17
Maximum DC 3σ [1] 0.49 1.20 0.51 1.21
Maximum DC (peak) 3σ 1.32 3.00 1.34 3.00
Peak operating current (random write):
Typical DC [1][6] [1] 0.51 1.03 0.53 1.04
Maximum DC 3σ [1] 0.56 1.05 0.58 1.07
Maximum DC (peak) 3σ 1.26 2.94 1.28 2.92
Peak operating current (sequential read):
Typical DC [1][6] [1] 0.98 0.83 0.99 0.84
Maximum DC 3σ [1] 1.08 0.84 1.10 0.85
Maximum DC (peak) 3σ 1.40 1.26 1.46 1.24
Peak operating current (sequential write):
Typical DC [1][6] [1] 0.93 0.83 0.94 0.83
Maximum DC 3σ [1] 1.00 0.84 1.02 0.85
Maximum DC (peak) 3σ 1.30 1.24 1.30 1.26