Seagate Elite 9 User Manual download pdf (Page 17)

Power requirements

The voltage and current requirements for a single drive at cylinder 0 are shown

in Table 3.

Table 3. Single drive voltage and current requirements

Current without Internal Current with Internal

Terminator Terminator

Seeking Contin- Seeking Contin-

and uous and uous

Voltage Idle Reading Reading Idle Reading Reading

SCSI single-ended interface

+5 V 1.87A 1.91 A 2.00 A 1.90 A 1.96 A 2.09A

+12 V 1.57 A 1.92 A 1.56A 1.57A 1.90A 1.56A

Watts 28.19W 32.59 W 28.72 W 28.34W 32.60 W 29.17 W

SCSI differential interface

+5 V 2.32A 2.63 A 2.75 A 2.45 A 2.77 A 2.85A

+12 V 1.63 A 1.88 A 1.64A 1.63A 1.88A 1.66A

Watts 31.21W 35.71 W 33.40 W 31.81W 36.41 W 34.17 W

Without Internal With Internal

Terminator Terminator

Maximum Current Limits +5 V +12 V +5 V +12 V

SCSI single-ended interface

Maximum operating current* 2.06 A 3.09A 2.37 A 3.04A

Average idle current 1.84A 1.92 A 1.96 A 1.92A

Maximum starting current* 2.06 A 3.98 A 2.37 A 3.98 A

Maximum seek current* 1.89 A 2.12 A 2.16 A 3.19 A

SCSI differential interface

Maximum operating current* 2.98 A 2.88 A 3.48 A 3.17 A

Average idle current 2.11A 1.85 A 2.45 A 1.63A

Maximum starting current* 2.98 A 3.98 A 3.48 A 4.60 A

Maximum seek current* 2.31 A 2.13 A 3.48 A 3.17 A

*Instantaneous +12 V current peaks will exceed these values by up to 0.8 A.

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Seagate Elite 9 User Manual Page 17