Unmasking the Culprit: Pinpointing PCI NMI Errors in AutoSupport

Your guide to leveraging NetApp AutoSupport for precise diagnosis of QLogic adapter panics.

When a critical system panic occurs, such as the "PCI Error NMI from device(s):ErrSrcID(CorrSrc(0xf00),UCorrSrc(0x18)), RPT(0,3,0):Qlogic FC 16G adapter in slot 1 on Controller", pinpointing the root cause quickly is paramount. NetApp's AutoSupport feature generates a wealth of diagnostic data. For this specific hardware-related panic, two sections are particularly crucial for effective analysis.

Key Insights for Analyzing the PCI NMI Panic

SSRAM-LOG (Option C) is indispensable for its detailed, low-level hardware error information, directly addressing the "PCI Error NMI" and associated error codes (ErrSrcID).
PCI-HIERARCHY.XML (Option D) is vital for identifying and contextualizing the specific PCI device mentioned in the panic – the "Qlogic FC 16G adapter in slot 1".
Together, these two sections provide a powerful combination: SSRAM-LOG reveals the nature of the hardware fault, while PCI-HIERARCHY.XML confirms the identity and configuration of the implicated component.

Deconstructing the Panic Message

The panic message "PCI Error NMI from device(s):ErrSrcID(CorrSrc(0xf00),UCorrSrc(0x18)), RPT(0,3,0):Qlogic FC 16G adapter in slot 1 on Controller" provides several key pieces of information:

PCI Error NMI: This indicates a Non-Maskable Interrupt triggered by a critical error related to the Peripheral Component Interconnect (PCI) bus or a device connected to it. NMIs are serious hardware errors that the system cannot ignore.
ErrSrcID(CorrSrc(0xf00),UCorrSrc(0x18)): These are error source identifiers. CorrSrc often points to a correctable error source, while UCorrSrc points to an uncorrectable error source. The hexadecimal values (0xf00, 0x18) are specific codes that can be cross-referenced in hardware documentation or diagnostic guides for more precise error identification.
RPT(0,3,0): This likely refers to the Requester ID (Bus 0, Device 3, Function 0) of the PCI device that reported or experienced the error, helping to locate it on the PCI bus.
Qlogic FC 16G adapter in slot 1 on Controller: This explicitly names the suspected faulting hardware component (a 16 Gigabit QLogic Fibre Channel adapter) and its physical location (slot 1 on the controller).

QLogic Enhanced Gen 5 16Gb Fibre Channel HBA

A QLogic Enhanced Gen 5 16Gb Fibre Channel Host Bus Adapter, similar to the type implicated in the panic message.

The Prime AutoSupport Suspects: SSRAM-LOG and PCI-HIERARCHY.XML

To effectively analyze this specific panic, the two most crucial sections within the AutoSupport bundle are C. SSRAM-LOG and D. PCI-HIERARCHY.XML.

C. SSRAM-LOG: The Hardware Error Chronicle

The SSRAM-LOG (System Static RAM Log) is a treasure trove of low-level hardware diagnostic information. It captures critical details about hardware events and errors, making it invaluable for investigating hardware-induced panics like the one described.

What It Contains:

Detailed logs of hardware errors, including those related to the PCI bus and connected peripherals.
Information on Uncorrectable Machine Check Errors (UMCEs) and Non-Maskable Interrupts (NMIs).
System-level error status registers and fault codes, potentially including expansions of ErrSrcID and RPT values.
Memory errors, ECC corrections, and other hardware-specific fault data.

Why It's Critical for This Panic:

For a "PCI Error NMI" originating from a QLogic adapter, the SSRAM-LOG is where you'd expect to find the raw details of the error condition reported by the hardware. It provides direct insight into what went wrong at the component level, potentially clarifying the nature of the UCorrSrc(0x18) error associated with the QLogic adapter.

D. PCI-HIERARCHY.XML: Mapping the Hardware Landscape

The PCI-HIERARCHY.XML file provides a structured overview of the system's PCI bus topology. It details all connected PCI devices, their configurations, and their physical locations within the system.

What It Contains:

A detailed map of the PCI device tree, including bus numbers, device numbers, and function numbers.
Information about each PCI device, such as vendor ID, device ID, subsystem ID, and class code.
Physical slot information, linking logical PCI addresses to physical locations on the motherboard or controller.
Configuration details for each device.

Why It's Critical for This Panic:

The panic message explicitly mentions a "Qlogic FC 16G adapter in slot 1". The PCI-HIERARCHY.XML file is essential for:

Verifying that a QLogic FC 16G adapter is indeed configured in slot 1.
Confirming its PCI bus address (which should correlate with the RPT(0,3,0) information).
Understanding its relationship with other PCI devices and the overall system architecture.

This file helps ensure that the analysis is focused on the correct component and provides necessary context about its hardware environment.

Synergistic Analysis: Why SSRAM-LOG and PCI-HIERARCHY.XML Work Together

The power of using both SSRAM-LOG and PCI-HIERARCHY.XML lies in their complementary nature. One tells you *what* specific hardware error occurred, while the other tells you precisely *which* component it was and *where* it is located.

AutoSupport Section	Information Provided for the Panic	Role in Diagnosis
SSRAM-LOG	Detailed hardware error codes (e.g., related to ErrSrcID, UCorrSrc), NMI specifics, low-level fault data from the PCI bus or QLogic adapter.	Identifies the nature and severity of the hardware fault. Helps understand the "PCI Error NMI" at a technical level.
PCI-HIERARCHY.XML	Confirmation of QLogic FC 16G adapter presence in slot 1, PCI bus/device/function details (correlating with RPT), device vendor/ID, system configuration.	Verifies the identity and location of the faulting component. Provides context on the hardware environment.

By cross-referencing information from these two files, support engineers can build a comprehensive picture of the failure, significantly improving the accuracy and speed of diagnosis and resolution, which often involves actions like reseating the card or replacing the faulty QLogic adapter.

Comparative Relevance of AutoSupport Sections for PCI NMI Analysis

To visualize the relative importance of different AutoSupport sections for diagnosing this specific "PCI Error NMI" from the QLogic adapter, the following chart assesses them against key diagnostic criteria. SSRAM-LOG and PCI-HIERARCHY.XML emerge as the most directly impactful for this scenario.

This chart illustrates that for direct hardware error details and device identification pertaining to the PCI NMI, SSRAM-LOG and PCI-HIERARCHY.XML score highest. While other logs like HA-RASTRACE.TGZ (for event sequencing and system context) and ALL-COREDUMP.XML (for kernel state) are valuable in broader troubleshooting, they are secondary for the initial, targeted analysis of this specific hardware fault.

Visualizing the Diagnostic Path

The following mindmap outlines the general approach to analyzing the "PCI Error NMI" using the key AutoSupport sections:

mindmap root["PCI NMI Panic Analysis"] id1["Panic Message Breakdown"] id1a["Device: Qlogic FC 16G adapter
Location: Slot 1 on Controller"] id1b["Error Type: PCI Error NMI"] id1c["Codes: ErrSrcID(CorrSrc(0xf00), UCorrSrc(0x18)),
RPT(0,3,0)"] id2["Primary AutoSupport Files for THIS Panic"] id2a["C. SSRAM-LOG"] id2a1["Contents: Low-level hardware errors,
NMI specifics, fault codes"] id2a2["Purpose: Decipher ErrSrcID, UCorrSrc,
understand NMI nature"] id2b["D. PCI-HIERARCHY.XML"] id2b1["Contents: PCI device tree,
slot info, configurations"] id2b2["Purpose: Verify QLogic adapter in Slot 1,
confirm RPT mapping, check configuration"] id3["Diagnostic Goals"] id3a["Identify exact faulting hardware component"] id3b["Understand the specific nature of the PCI error"] id3c["Correlate error with system configuration"] id4["Other AutoSupport Files (Contextual/Secondary for this NMI)"] id4a["A. HA-RASTRACE.TGZ"] id4a1["Provides: Broader event sequence,
HA interactions, system-level traces"] id4b["B. ALL-COREDUMP.XML"] id4b1["Provides: Kernel memory state at panic time,
useful for software/OS level issues"]

This mindmap illustrates how information from the panic message guides the selection of SSRAM-LOG and PCI-HIERARCHY.XML to achieve specific diagnostic goals related to the hardware failure.

Considering Other AutoSupport Sections

While SSRAM-LOG and PCI-HIERARCHY.XML are primary for this specific hardware NMI, other sections can offer supplementary information:

A. HA-RASTRACE.TGZ

The HA-RASTRACE.TGZ archive contains trace logs related to High Availability operations and inter-node communication. While not the first stop for a specific PCI device hardware error, it can be useful to:

Understand if the PCI error led to HA events (like a failover attempt).
See a broader sequence of system events that might have preceded or coincided with the NMI, offering wider context.
Capture error messages that might be logged at a higher system level.

For the direct diagnosis of the "PCI Error NMI" itself, its role is generally secondary to the more hardware-focused logs, but it can be crucial for understanding system impact.

B. ALL-COREDUMP.XML

The ALL-COREDUMP.XML file contains a dump of the system's memory at the time of the panic. This is extremely useful for:

Debugging kernel-level software bugs or driver issues that might lead to panics.
Analyzing the state of various processes and kernel structures.

However, for a panic explicitly identified as a "PCI Error NMI" from a hardware device, the core dump is often used to confirm that the panic originated from a hardware trap, rather than being the primary tool to diagnose the hardware fault itself. The hardware error details are usually more directly found in SSRAM-LOG.

Frequently Asked Questions (FAQ)

What exactly is a "PCI Error NMI"?

A "PCI Error NMI" is a Non-Maskable Interrupt triggered by a severe error related to the PCI (Peripheral Component Interconnect) bus or a device connected to it. "Non-Maskable" means the system cannot ignore this interrupt, as it usually indicates a critical hardware problem that could lead to data corruption or system instability. The system typically halts or panics to prevent further issues.

Why is the slot number ("slot 1") important in the panic message?

The slot number pinpoints the physical location of the problematic hardware component (the QLogic FC 16G adapter in this case) on the controller's motherboard or riser card. This is crucial for physical inspection, reseating the card, or replacing it if it's found to be faulty. PCI-HIERARCHY.XML helps confirm this physical-to-logical mapping.

Can other AutoSupport logs be useful in conjunction with SSRAM-LOG and PCI-HIERARCHY.XML?

Yes, absolutely. While SSRAM-LOG and PCI-HIERARCHY.XML are key for the initial hardware fault isolation, other logs like EMS (Event Management System) logs (often found in EMS-LOG-FILE.GZ), PANIC-CONTEXT.XML (for the panic string and stack trace), and HA-RASTRACE.TGZ (for system behavior context) can provide a more complete picture of the events surrounding the panic and its impact on the system.

What kind of information is typically found in ErrSrcID and RPT codes?

ErrSrcID (Error Source ID) codes, like CorrSrc (Correctable Source) and UCorrSrc (Uncorrectable Source), provide specific hexadecimal values that map to particular types of errors detected by the hardware. These are often vendor-specific or follow PCI Express reporting standards. RPT (Requester ID) typically indicates the Bus, Device, and Function number (BDF) of the PCI device that reported or experienced the error. These codes are crucial for hardware engineers to understand the precise nature and origin of the fault, often requiring lookup in technical reference manuals or diagnostic databases.