NS0-093 Online Practice Questions

Explanation:
To confirm the successful completion of an ONTAP upgrade, the cluster image show-update-progress command provides the necessary details.
Key Command:
Command:
cluster image show-update-progress
Displays the status of the cluster upgrade, including which nodes have successfully upgraded and whether the process has completed.
Why Other Options Are Incorrect:
A. system controller sp upgrade show:
This command displays information about SP (Service Processor) firmware upgrades, not ONTAP upgrades.
C. job show Cjobtype upgrade:
While this command shows upgrade jobs, it does not confirm the completion of the cluster-wide ONTAP upgrade.
D. system node upgrade-revert upgrade-task Cnode <nodename> Cversion <ontap Version>: This command reverts an upgrade task, not confirms completion.
Reference: NetApp "ONTAP Upgrade Guide" specifies the cluster image show-update-progress command as the primary method to verify upgrade completion.

Explanation:
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.
Reference: "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.

Explanation:
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.

Explanation:
When an aggregate fails due to multiple disk failures caused by a faulty I/O module (IOM), the first step after replacing the faulty IOM is to manually unfail the affected drives. This process is done in maintenance mode.
Steps to Recover the Aggregate:
Enter Maintenance Mode:
Reboot the node and interrupt the boot process to access maintenance mode.
Identify Failed Drives:
Use the command:
sql
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storage show disk Cbroken
This command lists all failed (broken) drives.
Unfail the Drives:
Use the following command for each failed drive:
php
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disk unfail <disk-name>
Reconstruct the Aggregate:
Once all drives are unfail, the system should begin reconstructing the RAID groups in the aggregate.
Why Other Options Are Incorrect:
A. Use diskcopy from maintenance mode:
Diskcopy is used for cloning or copying data between disks, not for recovering failed aggregates.
B. Run wafliron from the boot_menu:
wafliron is used to repair WAFL inconsistencies, but it does not help recover failed aggregates due to disk issues.
D. Unfail the drives in the order that they failed from the clustershell:
Drives must be unfail in maintenance mode, not from the clustershell.
Reference: NetApp’s "Aggregate and RAID Troubleshooting Guide" explains the process of recovering aggregates and using maintenance mode commands.
"ONTAP Disk Recovery Guide" outlines steps to unfail disks and recover RAID groups.

Explanation:
Explanation of RAID Label Versions:
Disks in ONTAP systems contain metadata known as RAID labels. These labels store critical information such as ownership, aggregate membership, and versioning.
The error indicates a mismatch between the RAID label version on the disk and the supported
versions of the ONTAP system.
Why Option D Is Correct:
If a disk has a RAID label created by a newer version of ONTAP (e.g., version 16) and is then inserted into a system running an older version of ONTAP (e.g., supporting versions 14-15), the label will not be recognized.
This mismatch causes ONTAP to reject the disk.
Resolution:
Upgrade the ONTAP version to match the RAID label on the disk.
Alternatively, zero the disk to reset its RAID label, but this will erase all data on the disk.
NetApp Reference Documentation:
The "ONTAP Disk Management Guide" and "ONTAP Compatibility Matrix" explain RAID label versions and compatibility issues when moving disks between ONTAP systems.