NetApp NS0-093 Exam Dumps

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.

Key Details:

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:

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setenv POST=true

Save the configuration and reboot the system.

Why Other Options Are Incorrect:

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.

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

To diagnose a PCI/NMI error and collect logs, use the following commands:

1. pelog --a --g=2

What it does: This command collects PCI error logs, including detailed information about PCI devices and the errors that caused the panic.

How to use: Run the command from the nodeshell to capture the required PCI log entries.

2. rdfile /mroot/etc/log/SSRAM

What it does: This command reads the SSRAM log file, which contains low-level error information related to PCI and other hardware subsystems.

How to use: Run the command to view the log entries directly for detailed troubleshooting.

Why Other Options Are Incorrect:

B . show pci --v:

While this command displays PCI device information, it does not provide detailed error logs.

D . event log show:

This displays event log entries but does not contain the specific PCI or NMI-related logs required for diagnosing the panic.

'ONTAP Hardware Troubleshooting Guide' lists pelog and SSRAM as tools for analyzing PCI errors.

'ONTAP Panic Analysis Guide' emphasizes the importance of collecting detailed hardware logs.

Command Syntax for Downloading ONTAP Image:

The cluster image package get command is used to download the ONTAP image from a specified URL to the cluster's image repository.

The syntax requires the --url parameter followed by the full URL of the image file.

Why Option C Is Correct:

This command syntax directly downloads the image from the local web server at http://192.168.10.10/ to the ONTAP cluster repository.

Other options either refer to incorrect commands or unsupported URLs.

NetApp Reference Documentation:

The 'ONTAP Software Upgrade Guide' provides the exact command and steps for downloading ONTAP images via HTTP or FTP.

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.

When a volume is deleted in a NetApp ONTAP system, it is placed in the Volume Recovery Queue. By default, the volume remains in this recovery queue for 12 hours before being permanently deleted. This allows administrators to recover mistakenly deleted volumes within the set retention period.

Explanation of Default Behavior:

Volume Recovery Queue:

This is a feature in NetApp ONTAP that acts as a safety mechanism, providing a grace period for recovering deleted volumes.

The default retention period for volumes in the recovery queue is 12 hours, as confirmed by the NetApp KB: 'How to use the Volume Recovery Queue.'

How to Recover a Deleted Volume:

Administrators can recover a deleted volume as long as it remains in the recovery queue and the retention period has not expired.

Use the ONTAP CLI command:

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cluster::> volume recovery-queue recover -vserver <vserver_name> -volume <volume_name>

This command restores the volume back to its original state.

How to Check the Volume Recovery Queue:

To view volumes in the recovery queue and their expiration times, use:

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cluster::> volume recovery-queue show

Changing the Default Retention Period:

While the default period is 12 hours, it can be adjusted by administrators to fit specific organizational requirements. This is done via system settings or policies.

Why the Other Options Are Incorrect:

B . 48 hours: Incorrect. The default retention period is not 48 hours; it is 12 hours by default.

C . 72 hours: Incorrect. While a custom configuration could allow this, it is not the default.

D . 24 hours: Incorrect. Although this was previously thought to be the default, NetApp documentation explicitly states it is 12 hours.

NetApp Knowledge Base Article: 'How to use the Volume Recovery Queue'.

NetApp ONTAP Documentation: Volume Recovery and Data Management Procedures.