Free Practice Questions for Netapp NS0-093 Exam

To troubleshoot the root cause of an unexpected controller reboot, the following tools are commonly used:

What it does:Provides monitoring and performance data for the ONTAP cluster, including historical event logs that may help identify the root cause of a reboot.

1. Active IQ Unified Manager

What it does:The CLI allows you to gather logs and status information directly from the affected node. Commands like event log show and system core are essential for identifying the reason behind the reboot.

2. ONTAP CLI

B. Active IQ Digital Advisor:

This tool focuses on predictive analytics and proactive recommendations, not troubleshooting unexpected reboots.

D. ONTAP Mediator:

This tool is used for managing MetroCluster configurations, not for troubleshooting reboots.

E. Active IQ Config Advisor:

This tool checks for configuration best practices but does not provide detailed logs or reboot diagnostics.

Why Other Options Are Incorrect:

NetApp "ONTAP System Management Guide" emphasizes the use of Unified Manager and CLI for troubleshooting system issues.

References:

In maintenance mode, the command disk show –v provides detailed information about disk ownership. This includes the current owner, previous owner, and disk health status.

Enter maintenance mode, and run:

How to Use:disk show –v

The output will display ownership information for each disk, including its RAID group and current assignment.

A. sysconfig –v:

This command provides system configuration details but does not show disk ownership.

C. aggr status:

This command shows the status of aggregates, not individual disks or their ownership.

D. storage show disk –p:

This command is not valid in maintenance mode.

Why Other Options Are Incorrect:

NetApp "Maintenance Mode Commands Guide" highlights disk show –v as the command to check disk ownership.

References:

To view information about installed Field Replaceable Units (FRUs) using the Service Processor, the following commands are used:

What it does:Displays a list of all installed FRUs, such as disks, power supplies, and fans.

Example Usage:

1. system fru listsystem fru list

What it does:Provides detailed information about specific FRUs, including serial numbers, statuses, and hardware details.

2. system fru showsystem fru show

C. system sensors show:

This command displays sensor data (e.g., temperature, voltage) but does not list FRUs.

D. system power status:

This command shows power supply status but does not provide FRU details.

Why Other Options Are Incorrect:

"Service Processor Commands Guide" from NetApp provides a comprehensive overview of system fru list and system fru show.

References:

 Options for Uploading Core Files:

Core files are diagnostic dumps created during system failures for analysis by NetApp Support.

They can be uploaded via multiple methods, depending on system configuration and access:

 Option B (CIFS Download):

Core files can be downloaded from the node using a CIFS share and then manually uploaded to upload.netapp.com.

This method is useful if automated processes are unavailable or connectivity is limited.

 Option D (Autosupport Invoke-Core-Upload):

The command system node autosupport invoke-core-upload automates the process of uploading the core file to NetApp.

It uses the configured Autosupport mechanism to transfer the file to NetApp Support for analysis.

 NetApp Reference Documentation:

"ONTAP Autosupport Guide" and "ONTAP Troubleshooting Guide" provide instructions for manually and automatically uploading core files.

To ensure that POST (Power-On Self-Test) runs on boot, the setenv POST=true command is used at the LOADER prompt. This command enables the system to perform POST diagnostics before proceeding with the boot process.

POST Purpose: POST checks system hardware components (such as memory, disk, and controllers) for faults before loading the ONTAP kernel.

How to Use:

At the LOADER prompt, type:

Key Details:arduino

Copy code

setenv POST=true

Save the configuration and reboot the system.

B. bye:

This command restarts the system but does not ensure that POST runs on boot.

C. boot_diag:

This command boots the system into diagnostic mode but is not directly related to enabling POST on boot.

D. boot_ontap:

This command boots ONTAP but skips POST if it is not explicitly enabled.

Why Other Options Are Incorrect:

NetApp "ONTAP System Boot and Recovery Guide" describes setenv POST=true for enabling POST diagnostics.

References:

 Understanding a Single PHY Down Issue:

In SAS environments, a PHY represents a physical layer connection between devices.

When a single PHY reports a "down" status, it typically indicates an issue with the physical connectivity or the associated hardware.

 Cause 1: Improperly Seated Cable

If the SAS cable is not properly seated in the port, the connection for one or more PHYs may fail.

Reseating the cable on both ends (controller and shelf) often resolves the issue.

 Cause 2: Defective Cable

A damaged or faulty SAS cable can cause PHY errors.

Replacing the cable and verifying the connection resolves the issue in this case.

 Why Other Options Are Not Likely:

B. Outdated IOM firmware: While outdated firmware can cause other issues, it rarely affects only a single PHY.

D. Offline shelf: If an entire shelf is offline, more than one PHY would typically be affected, as multiple connections are involved in SAS stacks.

 NetApp Reference Documentation:

Found in the "ONTAP SAS Cabling Guide" and "Shelf Troubleshooting Guide". These documents detail troubleshooting for PHY errors and common SAS hardware issues.

The following ONTAP systems support both SSD and SAS disks:

Description:

The FAS2750 is part of NetApp's hybrid storage array product line.

It supports both SSDs for performance tiers and SAS disks for capacity tiers, making it suitable for mixed workloads.

1. FAS2750

Description:

The FAS8200 is an enterprise-level storage system that also supports hybrid configurations with both SSD and SAS drives.

This system is designed to handle high performance and capacity needs.

2. FAS8200

A. AFF C190:

The AFF C190 is an all-flash system and only supports SSDs. It does not support SAS disks.

C. AFF A220:

Like the AFF C190, the AFF A220 is also an all-flash system that supports SSDs only.

Why Other Options Are Incorrect:

NetApp "Hardware Universe" confirms drive support for FAS and AFF systems.

NetApp product documentation details supported disk types for hybrid and all-flash systems.

References:

To trigger an AutoSupport message in ONTAP, the following commands are valid:

What it does:This command manually triggers a complete AutoSupport message of type "all." This includes logs and system information from all subsystems.

How to use:

Run the command: autosupport invoke –node –type all

Replace with the name of the node for which you want to generate the AutoSupport message.

Why it's relevant:This is the primary method for triggering a full AutoSupport message manually. It is commonly used during troubleshooting to provide comprehensive system data to NetApp Support.

1. ::> autosupport invoke –node –type all

What it does:This command is specifically used to upload core files (e.g., kernel or user space cores) from a node to NetApp Support for analysis.

How to use:

Run the command: autosupport invoke-core-upload –node .

Replace with the name of the node for which you want to upload core files.

Why it's relevant:If there is a system panic or other critical issue, this command ensures that core files are included in the AutoSupport message for detailed analysis.

2. ::> autosupport invoke-core-upload –node

A. ::> autosupport history show-upload-details –node <nodename>:

This command displays the history of AutoSupport uploads but does not trigger a new AutoSupport.

B. ::> system node coredump upload –node <nodename>:

This command uploads coredumps directly to a support server but does not trigger an AutoSupport message.

Why Other Options Are Incorrect:

"ONTAP 9 AutoSupport Configuration Guide" confirms autosupport invoke as a valid command to trigger AutoSupport messages.

"ONTAP CLI Reference Manual" specifies autosupport invoke-core-upload for core file uploads.

References:

 FRUs on FAS9000 Supporting Replacement Without Takeover:

A (I/O Module): I/O modules can be replaced hot (without takeover) to maintain system uptime during hardware servicing.

D (NVRAM Module): NVRAM modules on FAS9000 can also be replaced without a node takeover, ensuring data integrity during replacement.

 Why Other Options Are Incorrect:

B (DCPM Module): The DCPM (Data Center Power Management) module is not hot-swappable and requires a node takeover.

C (Caching Module): The caching module is integrated and typically requires a node takeover or power-down for replacement.

 NetApp Reference Documentation:

Refer to the "NetApp FAS9000 Hardware Service Guide" for supported FRU replacement procedures and operational constraints.