Model D20 Disk Drives
12 hot-plug disk-drive bays are provided. The bays are located behind the Model D20
front bezel. The Model D20 has from 18.2 GB to 1.7 terabytes of disk storage capacity.
The following disk drive sizes and speeds are available:
v 18.2 GB Ultra3 10K RPM 1 inch
v 36.4 GB Ultra3 10K RPM 1 inch
v 73.4 GB Ultra3 10K RPM 1 inch
v 146.8 GB Ultra3 10K RPM 1 inch
For an updated listing of hot-plug disk-drive sizes, contact your sales representative.
Model D20 Power
The Model D20 is standard with one power supply. If the customer wants redundant
power in their I/O subsystem, an optional power supply can be ordered. Either power
supply in a Model D20 configured with two power supplies is capable of providing the
necessary voltages and currents, independent of the other power supply. The left and
right power-supply output voltages are connected and monitored by the power
distribution board contained in the I/O subsystem.
The left and right power supplies are hot-pluggable and may be changed one at a time
while the system is operational. Each power supply is capable of converting available
110/220 V ac to the proper internal voltages used by the system components. The
internal voltage range is 5 volts system standby, 3.3 volts, 5 volts, 12 volts and -12
volts. When operating correctly, each supply will share the current load when powered
on. When in a fault state, the operable power supply will supply standby current to the
faulted supply for the DEVROS module. The following table describes power related
LED indicators that are available on the Model D20. The Operator Panel LED referred
to in the table below is on the front of the processor subsystem to which the I/O
subsystem is attached.
Status of LED Operator Panel LED (processor subsystem)
Off Power Source not connected
Blinking green LED System power source connected, but power is
not turned on
Blinking green LED, visibly begins to blink
faster after the power button has been pressed.
System power connected, the power on button
has been pressed and power-on initiated
Solid (not blinking) green LED, (There is
approximately a 30 second transition period
from the time the power on button is pressed to
the time the power LED is on solid.)
System power connected and turned on
18 Eserver pSeries 7311 Model D10 and Model D20 Service Guide
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