Power Subsystem; Power Subsystem Behavior; Power Led/Switch - HP Integrity rx2660 User's & Service Manual

For the PCI-X I/O backplane:
• Two LBA chips use two dual-rope (4 ropes total) interfaces to support two single 64-bit
PCI-X slots running @ 133 MHz
• One LBA chip uses one quad-rope interface to support one single 64-bit PCI-X slot running
@ 266 MHz
For the PCI-X/PCIe backplane:
• One LBA chip uses one dual-rope interface to support one single 64-bit PCI-X slot running
@ 133 MHz
• Two LBA chips use two quad-rope (8 ropes total) interfaces (for customer use) to support
two PCI express x8 slots

Power Subsystem

The two power supply CRUs for the rx2660 server provides N+1 redundancy for the server. Each
power supply CRU is identified by the server as 1 and 2 for logging purposes. There are
corresponding LEDs on the diagnostic LED panel for the power supplies.
Power supply CRU failures are identified visually by a single green LED that is turned off when
one or both of the power supplies fail; logged as an IPMI event by voltage sensor logic; and
identified as a power supply CRU failure by the BMC turning on the appropriate LEDs on the
front LED panel.

Power Subsystem Behavior

For rx2660 servers, each bulk power supply CRU provides 900 watts of dc power from a nominal
120 VAC, 50-60 Hz; and 1000 watts from a nominal 240 VAC, 50-60 Hz. The BMC chip located
on the system board controls the flow of +12 VDC power to the server CRUs. You can control
and display power supply status remotely with the iLO MP pc and ps commands, respectively.
Typical power up sequence of the server is as follows:
• Power LED on front panel glows steady amber when one or two bulk power supplies are
plugged into nominal ac voltage and the +3.3 VDC housekeeping voltage comes on and
stays on whenever ac power is present.
• The BMC, iLO 2 MP, Flash memory, and server intrusion circuits are reset after the +3.3
VDC housekeeping voltage stabilizes.
• The BMC monitors the power button on the front panel.
• When the power button is pressed, the BMC signals the bulk power supplies to fully power
up.
• +12 VDC comes up and all of the cooling fans and the various VRMs come up sequentially.
• The BMC signals when the server is ready to come out of reset (clocks are programmed and
stable, etc.).
• The server is brought out of reset.
• The zx2 chip resets all components connected and the server begins the boot process.

Power LED/Switch

The front panel system power LED indicates the status of system power. It is incorporated inside
the power button itself.
The power button has a momentary switch (as opposed to a latching switch) that is recessed or
covered to prevent accidental activation or de-activation.
If the OS is up, pressing the power button for less than four seconds results in a graceful shutdown
of the operating system and a subsequent removal of system power. Pressing the power button
for greater than four seconds results in a hard shutdown (system power removed). While the
server is booting (before the system has passed EFI_EXIT_BOOT_SERVICES), the BMC
130 Troubleshooting