Seagate Barracuda ATA II 100 Series Manual descarregar pdf (Página 17)

10 Barracuda ATA II 100 Family Product Manual, Rev. A

1.7.2 Conducted noise

Input noise ripple is measured at the host system power supply across

an equivalent 80-ohm resistive load on the +12 volt line or an equivalent

15-ohm resistive load on the +5 volt line.

•

Using 12-volt power, the drive is expected to operate with a maximum

of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.

•

Using 5-volt power, the drive is expected to operate with a maximum

of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.

Note.

Equivalent resistance is calculated by dividing the nominal volt-

age by the typical RMS read/write current.

1.7.3 Voltage tolerance

Voltage tolerance (including noise):

1.7.4 Power-management modes

The drive provides programmable power management to provide great-

er energy efficiency. In most systems, you can control power manage-

ment through the system setup program. The drive features the following

power-management modes:

•

Active mode

The drive is in Active mode during the read/write and seek operations.

•

Idle mode

The buffer remains enabled, and the drive accepts all commands and

returns to Active mode any time disc access is necessary.

5V ± 5% 0.7 amps max

12V + 10%, – 5% 2.4 amps max

Power Modes Heads Spindle Buffer

Active Tracking Rotating Enabled

Idle Tracking Rotating Enabled

Standby Parked Stopped Enabled

Sleep Parked Stopped Disabled

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Seagate Barracuda ATA II 100 Series Manual Página 17