I/O Backplane (Lbas/Ropes/Pdh/Pci-X/Pcie Slots); I/O Subsystem Behaviors; Customer Messaging Policy - HP Integrity rx2660 User's & Service Manual

I/O Backplane (LBAs/Ropes/PDH/PCI-X/PCIe Slots)

This subsection provides information on troubleshooting issues with the three public PCI-X/PCIe
slots.

I/O Subsystem Behaviors

The main role of the I/O subsystem is to transfer blocks of data and instruction words between
physical shared memory and virtual memory (system disks / disk array). The system boot is the
first time blocks of data and instructions words are transferred into physical shared memory from
a local disk / DVD or from a remote disk on another server through multiple LAN transfers. This
process is referred to as Direct Memory Access (DMA) and is initiated by I/O devices located in
I/O or on Host Bus Adapter (HBA) I/O cards and does not involve any logical CPUs.
A secondary role of the I/O subsystem is to transfer data between the internal registers within each
CPU core and the internal control/store registers within the zx2 / PDH / Local Bus Adapters (LBA)
and HBA chips. This process is referred to as programmed I/O and is initiated by logical CPUs
executing external LOAD / STORE instructions. Both system firmware and OS kernel both use this
method to initiate DMA transfers.

Customer Messaging Policy

Always refer to the SEL for any action from low level I/O subsystem faults as there might not
be any lighted LEDs on the System Insight Display. IPMI events in SEL / FPL provide the logical
ACPI path of suspect I/O subsystem CRU. Use
number.
For configuration style errors, for example, no iLO 2 MP / core I/O HBAs installed or working,
see Supported Configurations subsection for actions.
Some diagnostic messages are reported for high level I/O subsystem errors; all fatal I/O
subsystem errors cause global MCAs. HP-UX provides its own path with the physical rope
number of the suspect I/O subsystem CRU. Use
number.
Table 53 I/O Subsystem Events That Light System Insight Display LEDs
Diagnostic
LED(s)
I/O Card
I/O Backplane
Disk Backplane
Table 54 I/O Card Events That Could Light System Insight Display LEDs
Diagnostic
LED(s)
I/O Card
130 Troubleshooting
Sample IPMI Events
Type 02h, 03h:05h:01h
CURRENT_LIMIT_EXCEEDED
Type 02h, 02h:07h:03h
VOLTAGE_DEGRADES_TO_NON_RECOVERABLE
Type 02h, 02h:07h:03h
VOLTAGE_DEGRADES_TO_NON_RECOVERABLE
Sample IPMI Events
Type E0h, 4658d:26d
IO_PCI_POWER_OVERLOAD_ERR
Table 55 to determine the physical PCI slot
Table 55 to determine the physical PCI slot
Cause
Over-current on PCI slot
Voltage on CRU is
inadequate
Voltage on CRU is
inadequate
Cause Source
A non hot plug I/O SFW
slot power
consumption increases
the total I/O power
Source Notes
BMC Likely a short on
I/O card or I/O
slot.
BMC A voltage on the
I/O backplane is
out of range
(likely too low)
BMC A voltage on the
I/O backplane is
out of range
(likely too low)
Notes
Disallow O/S
boot and display
the following EFI
error message,
"I/O