Seagate Enterprise Performance 10K HDD v8 Product Manual, Rev. A
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General DC power consumption notes.
1.
Minimum current loading for each supply voltage is not less than 1.7% of the maximum operating current shown.
2.
The +5V and +12V supplies should employ separate ground returns.
3.
Where power is provided to multiple drives from a common supply, careful consideration for individual drive power consump-
tion should be noted. Where multiple units are powered on simultaneously, the peak starting current must be available to each
device.
4.
Parameters, other than spindle start, are measured after a 10-minute warm up.
5.
No terminator power.
6.3.1
Conducted noise immunity
Noise is specified as a periodic and random distribution of frequencies covering a defined frequency range. Maximum allowed noise
values given below are peak-to-peak measurements and apply at the drive power connector.
6.3.2
Power sequencing
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down.
6.3.3
Current profiles
The +12V and +5V current profiles for the Seagate Enterprise Performance 10K HDD drives are shown below
Figure 1.
Current profiles for 600GB models
+5v
=
250 mV pp from 100 Hz to 20 MHz.
+12v
=
450 mV pp from 100 Hz to 100 KHz.
250 mV pp from 100 KHz to 20 MHz.
150 mV pp from 20 MHz to 80 MHz.
