NetApp Accredited Hardware Support Engineer NS0-093 Exam Practice Test

Answer : A

If the ENVIRONMENT section of the latest MANAGEMENT LOG AutoSupport message is empty, the reason can typically be found in the AUTOSUPPORT-BUDGET.XML file. This file contains information about AutoSupport resource allocation, including what sections were processed and any limits that were hit.

Key Details:

AUTOSUPPORT-BUDGET.XML:

This file provides a summary of the resources (budget) allocated for different AutoSupport sections.

If the ENVIRONMENT section is missing or empty, the AUTOSUPPORT-BUDGET.XML file will indicate whether it was skipped due to resource constraints or configuration limits.

Why Other Sections Do Not Apply:

B . HEADERS: This section only contains metadata about the AutoSupport message, such as timestamps and node details. It does not explain missing sections.

C . AUTOSUPPORT-HISTORY.XML: This file tracks the history of AutoSupport messages but does not provide information about missing sections.

'ONTAP AutoSupport Troubleshooting Guide' explains the role of the AUTOSUPPORT-BUDGET.XML file in diagnosing missing or incomplete AutoSupport sections.

Answer : A

Reverting to a Previous ONTAP Version:

Reverting ONTAP software requires specific procedures and is only supported if the ONTAP version being reverted to is compatible with the current cluster configuration.

Why the Netboot Procedure Is Used:

The netboot process loads the desired ONTAP version directly into memory from a network location and reinitializes the system.

This method is used when a full software revert is required and is often necessary for downgrades to a version that cannot be directly reverted to from the running ONTAP version.

Key Notes:

A direct revert is not supported from ONTAP 9.7 to ONTAP 9.5 using standard methods due to system metadata changes.

Always verify compatibility using the 'ONTAP Software Version Interoperability Matrix'.

NetApp Reference Documentation:

Refer to the 'ONTAP Revert/Downgrade Guide' for specific instructions on using the netboot procedure.

Answer : C

To collect shelf logs for a DS4246 shelf in an ONTAP 9.12.1 system, you must invoke a diagnostic AutoSupport specifically targeting the storage subsystem. This action ensures that detailed storage logs, including shelf logs, are included in the AutoSupport bundle.

Steps to Collect Shelf Logs:

Use the following command:

bash

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system node autosupport invoke -node <node_name> -type diagnostic -subsystem storage

Replace <node_name> with the name of the node experiencing the issue.

This command generates an AutoSupport message that includes logs related to storage subsystems, such as disk shelves and adapters.

Provide the AutoSupport case number to NetApp Support for further analysis.

Why Other Options Are Incorrect:

A . Provide the output of the nodeshell command rdfile /etc/log/shelflog:

While this command allows manual reading of shelf logs, it is not a recommended or comprehensive approach for collecting logs for NetApp Support cases.

B . Invoke an AutoSupport of type all using Active IQ Unified Manager:

This action generates a generic AutoSupport bundle, which may not include detailed shelf logs unless explicitly targeted.

D . Invoke a diagnostic AutoSupport with the subsystem log_files:

The log_files subsystem targets general system logs, not storage-specific logs like shelf logs.

'ONTAP 9 AutoSupport and Diagnostics Guide' outlines the use of the subsystem storage option for collecting shelf logs.

The 'Troubleshooting Storage Subsystems' documentation specifies diagnostic AutoSupport as the method for gathering shelf-related logs.

Answer : A, C

Possible Causes for 'No Disks' Error:

A (Incorrect SAS Cabling): If the SAS cables are incorrectly reconnected or swapped after replacing the boot device, the disks may not be detected because the physical connection to the shelves is compromised. Verifying and reseating the SAS cables is essential.

C (Lower ONTAP Version): If the node boots into an ONTAP version that is lower than the version previously used, it might not recognize the RAID labels or disk metadata created by the higher ONTAP version.

Why Other Options Are Incorrect:

B (Disks Marked as Failed): Disks that are marked as failed would still be visible in the system, though unusable.

D (Interconnect Down): An interconnect failure affects HA functionality but does not prevent a node from detecting its own disks.

NetApp Reference Documentation:

Refer to the 'ONTAP Boot Recovery Guide' and 'SAS Cabling Guide' for steps to resolve disk detection issu

Answer : C, D

Reverting to a previous ONTAP version requires careful preparation because ONTAP upgrades often introduce irreversible changes. To successfully revert, the following actions are needed:

C . Reinstall your boot media and install ONTAP 9.5 software

Explanation: You need to reinstall the older version of ONTAP (9.5) on the boot media because the current version (9.7) has been installed as part of the upgrade. The reinstallation ensures that the system boots with ONTAP 9.5.

Steps:

Boot the node into maintenance mode.

Perform the reinstallation using the appropriate ONTAP 9.5 image.

D . Wipe your config and restore from backup

Explanation: A revert requires wiping the configuration because ONTAP upgrades may have made changes to the cluster configuration or WAFL metadata. Restoring the configuration from a backup ensures consistency with the older ONTAP version.

Steps:

Back up the current cluster configuration before proceeding.

Use the restored backup after the revert is complete to reconfigure the system.

Why the Other Options Are Incorrect:

A . Revert from ONTAP 9.7 software to ONTAP 9.6 software and then to ONTAP 9.5 software:

Incorrect. ONTAP reverts must directly target the desired version. You cannot perform multi-step reverts.

B . Delete all Snapshot copies from the past two days:

Incorrect. Deleting Snapshot copies is not a prerequisite for reverting ONTAP. While older Snapshot copies might not be compatible with the reverted version, they do not need to be deleted before the revert.

NetApp Documentation: ONTAP Upgrade and Revert Procedures.

NetApp Knowledge Base: Steps for reinstallation and configuration restoration during a revert.

Answer : A, C

To analyze the provided panic error, the two sections of AutoSupport that are essential for investigation are:

1. HA-RASTRACE.TGZ

What it is: HA-RASTRACE.TGZ contains HA (High Availability) system trace logs. It records hardware diagnostics, error traces, and the HA system's response to hardware events. These logs are critical when analyzing hardware-related panics, including those caused by PCI errors.

Why it's relevant to the panic: In the given panic message, the NMI (Non-Maskable Interrupt) error originates from a Qlogic FC 16G adapter. HA-RASTRACE.TGZ will provide detailed diagnostics, including the error reporting from the HA interconnect and other hardware diagnostics. Specifically, it may include information about how the system detected the PCI fault and any actions taken to protect the system state.

How to analyze:

Extract the HA-RASTRACE.TGZ file from the AutoSupport bundle.

Review hardware-related trace messages for entries associated with the PCI bus or the Qlogic FC adapter.

Look for specific error codes or keywords like PCI Error, NMI, or Qlogic.

NetApp's 'AutoSupport Logs and Diagnostics Guide' highlights HA-RASTRACE.TGZ as a primary resource for debugging hardware faults.

The 'Panic Troubleshooting Guide' for ONTAP systems specifies HA-RASTRACE as a key source for identifying NMI-related errors.

2. SSRAM-LOG

What it is: SSRAM-LOG records low-level hardware error details, including PCI device register states and uncorrectable memory errors. It is particularly useful for analyzing errors originating in peripheral hardware like network or storage adapters connected via PCI.

Why it's relevant to the panic: The panic message explicitly references a PCI Error NMI caused by a Qlogic FC adapter. SSRAM-LOG captures detailed state information for PCI devices, which can help identify whether the fault originated in the adapter hardware, the PCI bus, or another related component.

How to analyze:

Extract the SSRAM-LOG from the AutoSupport bundle.

Search for PCI-related errors, including the specific error source IDs (e.g., ErrSrcID(CorrSrc(0xf00),UCorrSrc(0x18))).

Review the log entries to confirm the root cause of the NMI.

The 'Hardware Diagnostics and Troubleshooting Guide for ONTAP' lists SSRAM-LOG as a key file for debugging PCI errors.

NetApp's documentation on PCI diagnostics emphasizes the use of SSRAM-LOG for validating hardware-level faults.

Answer : C

The Upgrade Advisor is a NetApp tool that generates a detailed, step-by-step plan for upgrading an ONTAP system. This tool is available through the Active IQ portal and helps ensure a smooth and risk-free upgrade process.

Key Features of Upgrade Advisor:

Provides a tailored upgrade plan based on the current ONTAP version, cluster configuration, and desired target version.

Identifies potential risks, compatibility issues, and pre-requisite tasks for the upgrade.

Offers detailed instructions for each stage of the upgrade process.

Why Other Options Are Incorrect:

A . ONTAP System Manager:

While System Manager can be used to initiate upgrades, it does not generate a detailed upgrade plan.

B . Active IQ Unified Manager:

Unified Manager focuses on monitoring and management but does not provide upgrade plans.

D . Active IQ Config Advisor:

Config Advisor checks for best practices and configuration issues but is not used for generating upgrade plans.

NetApp's 'ONTAP Upgrade Guide' emphasizes the use of Upgrade Advisor for planning upgrades.

Active IQ documentation provides detailed instructions on accessing and using the Upgrade Advisor tool.