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Latest Network Appliance NS0-093 of exam practice questions and answers

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Network Appliance NetApp Accredited Hardware Support Engineer Sample Questions (Q15-Q20):

NEW QUESTION # 15
What are two options to remove Failure Byte on disks that are marked as failed? (Choose two.)

A. Unfail the disk
B. Reseat the disk.
C. Power cycle the disk shelf.
D. Update the disk firmware.

Answer: A,B

Explanation:
If a disk is marked as failed, the Failure Byte on the disk indicates that the disk has been flagged for failure.
This can be cleared using the following methods:
* What it does:Physically remove the disk from the shelf and reseat it. This action can trigger the system to re-evaluate the disk's status and clear the Failure Byte if the failure was transient or due to connection issues.
1. Reseat the Disk
* What it does:Using the disk unfail command in maintenance mode clears the Failure Byte and returns the disk to service.
* Command Example:
2. Unfail the Diskdisk unfail <disk_name>
* A. Power cycle the disk shelf:
* Power cycling the shelf may clear other transient hardware issues but does not specifically clear the Failure Byte.
* C. Update the disk firmware:
* While updating firmware can prevent future issues, it does not address disks already marked as failed.
Why Other Options Are Incorrect:
* NetApp "Disk Maintenance Guide" explains procedures to address failed disks.
* The "ONTAP Command Reference" covers the disk unfail command for clearing the Failure Byte.
References:

NEW QUESTION # 16
Which two steps are required to replace a drawer in a DS460c shelf? (Choose two.)

A. Evacuate all drives in the drawer.
B. Shut down both nodes.
C. Disconnect the cable chains from the chassis.
D. Power off the shelf.

Answer: A,C

Explanation:
To replace a drawer in a DS460c shelf, the following steps must be taken:
* Why this is required:Cable chains connect the drawer to the shelf and must be disconnected to safely remove the drawer.
1. Disconnect the cable chains from the chassis
* Why this is required:Drives must be removed to avoid damage during the drawer replacement process and to reduce the weight of the drawer for safe handling.
2. Evacuate all drives in the drawer
* A. Shut down both nodes:
* This is unnecessary because DS460c shelves support online replacement, and the system can remain operational.
* C. Power off the shelf:
* This is also unnecessary. DS460c shelves are hot-swappable, meaning they do not require the shelf to be powered down.
Why Other Options Are Incorrect:
* "DS460c Hardware Service Guide" explains the procedure for replacing a drawer.
* NetApp's "Field Replacement Guide" for DS460c shelves emphasizes online and hot-swappable replacements.
References:

NEW QUESTION # 17
A node has panicked with a PCI/NMI error. Giveback has not been performed.
Which two commands should you run to collect the logs to determine the cause? (Choose two.)

A. show pci -v
B. rdfile /mroot/etc/log/SSRAM
C. event log show
D. pelog -a -g=2

Answer: B,D

Explanation:
To diagnose a PCI/NMI error and collect logs, use the following commands:
* 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.
1. pelog -a -g=2
* 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.
2. rdfile /mroot/etc/log/SSRAM
* 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.
Why Other Options Are Incorrect:
* "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.
References:

NEW QUESTION # 18
What is the recommended value for disk and CPU use when you plan an upgrade?

A. less than 85%
B. less than 90%
C. less than 70%
D. less than 50%

Answer: C

Explanation:
Upgrade Considerations for Disk and CPU Utilization:
* During an ONTAP upgrade, it is critical to ensure the system has sufficient resources to handle the upgrade process without impacting normal operations.
Recommended Threshold:
* NetApp recommends that both disk and CPU utilization should be below 70% before initiating an upgrade. This ensures that there is enough headroom for the upgrade operations and avoids performance degradation.
Steps to Verify Utilization:
* Use the system node show -fields cpu command to check CPU usage.
* Use the storage aggregate show -fields used command to check aggregate disk utilization.
NetApp Reference Documentation:
* "ONTAP Upgrade and Maintenance Guide" specifies the 70% threshold for disk and CPU usage during upgrade planning.
* The "ONTAP Performance Management Guide" provides methods for monitoring system resource utilization.

NEW QUESTION # 19
What should be the first step taken after detecting a NetApp WAFL inconsistency?

A. Run wafliron.
B. Force offline the affected aggregate.
C. Run a dump to null.
D. Stabilize the system.

Answer: D

Explanation:
When a WAFL inconsistency is detected, the first step is to stabilize the system before attempting any repairs or recovery.
* Stabilize the System:
* Ensure that the system is not experiencing ongoing hardware or software issues.
* Avoid making changes to the affected aggregate or volume until the system is stable.
* Assess the Impact:
* Determine which aggregates or volumes are affected and the severity of the inconsistency.
Steps to Handle WAFL Inconsistency:
* A. Run wafliron:
* Running wafliron should only be done after stabilizing the system and under guidance from NetApp Support.
* C. Force offline the affected aggregate:
* Forcing an aggregate offline without proper assessment can lead to data loss.
* D. Run a dump to null:
* Dumping data is not relevant for resolving a WAFL inconsistency.
Why Other Options Are Incorrect:
* "NetApp WAFL Troubleshooting Guide" specifies that stabilization is the first step after detecting inconsistencies.
* NetApp Support documentation provides guidelines for handling WAFL inconsistencies safely.
References:

NEW QUESTION # 20
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