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Network Appliance NetApp Accredited Hardware Support Engineer Sample Questions (Q18-Q23):

NEW QUESTION # 18
Which two commands confirm whether an aggregate is WAFL inconsistent? (Choose two.)

A. node run -node <node> sysconfig -a
B. storage aggregate show
C. wafiron show <aggregate>
D. node run -node <node> sysconfig -r

Answer: C,D

Explanation:
To determine whether an aggregate is WAFL (Write Anywhere File Layout) inconsistent, the following two commands can be used:
* What it does:This command directly checks the WAFL consistency status of the specified aggregate. If an aggregate is WAFL inconsistent, it will report the inconsistency in the output.
* How to use:
* Run the command: wafiron show <aggregate> (replace <aggregate> with the name of the aggregate).
* Look for indications of WAFL inconsistency in the output.
* Why it's relevant:The wafiron utility is specifically designed to provide WAFL status and diagnostics.
It is the most accurate and direct way to confirm whether an aggregate is inconsistent.
* References:
* "WAFL Troubleshooting Guide" from NetApp highlights the wafiron show command as a primary tool for checking aggregate consistency.
1. wafiron show <aggregate>
* What it does:This command displays RAID information for all aggregates on the specified node. If an aggregate is WAFL inconsistent, it will be explicitly mentioned in the output.
* How to use:
* Run the command: node run -node <node> sysconfig -r.
* Check the output for the phrase "WAFL inconsistent" under the corresponding aggregate.
* Why it's relevant:This command provides additional context, such as the RAID group details, which can help understand whether the inconsistency is isolated or part of a larger issue.
* References:
* "ONTAP CLI Commands Guide" specifies sysconfig -r as a method to verify aggregate status, including WAFL consistency.
2. node run -node <node> sysconfig -r
* C. storage aggregate show:
* This command displays aggregate configuration and usage information but does not report WAFL inconsistency.
* D. node run -node <node> sysconfig -a:
* While this command shows detailed hardware configuration information, it does not include WAFL consistency status for aggregates.
Why Other Options Are Incorrect:

NEW QUESTION # 19
Your customer notices that their AFF A220 high-availability (HA) system is showing Single-Path HA.

How do you make the system into multipath HA?

A. 0c and 0d on both controllers should be connected.
B. 0a and 0b on both controllers should be connected.
C. 0a and 0c on both controllers should be connected.
D. 0a and 0d on both controllers should be connected

Answer: C

Explanation:
In a NetApp high-availability (HA) configuration, multipath HA ensures redundancy by providing two independent paths from each controller to the connected storage. If the system is currently showing Single- Path HA, it means only one path is operational or connected, which is a potential single point of failure.
To convert the configuration to multipath HA, additional cabling must be configured to establish the second path. For the AFF A220 system, the correct connections are as follows:
Explanation of the Correct answer:
* AFF A220 Port Configuration for HA:
* Each controller in an AFF A220 has ports labeled 0a, 0b, 0c, and 0d for connectivity.
* In a multipath HA configuration, each controller must have two independent paths to the connected storage via the partner controller's disk shelves.
* Correct Cabling for Multipath HA:
* Port 0a on both controllers must be connected to the corresponding port (e.g., disk shelf stack or Inter-Switch Link).
* Port 0c on both controllers must also be connected to complete the redundant path.
* These connections ensure that there are two independent data paths between the controllers and the storage system, providing fault tolerance in case one path fails.
* Single-Path HA to Multipath HA:
* If the system currently shows Single-Path HA, it is likely that only one set of ports (e.g., 0a and
0b) are cabled.
* Adding the additional connections on 0a and 0c establishes the second path required for multipath HA.
Why the Other Options Are Incorrect:
* A. 0a and 0b on both controllers should be connected:
* This option only connects ports 0a and 0b, which does not establish a multipath HA configuration. Port 0c is also required for redundancy.
* C. 0c and 0d on both controllers should be connected:
* Connecting only 0c and 0d would leave ports 0a disconnected, failing to establish a proper multipath HA setup. Both 0a and 0c are required.
* D. 0a and 0d on both controllers should be connected:
* Connecting 0a and 0d is not the standard configuration for multipath HA in an AFF A220 system. Port 0c is part of the required configuration.
How to Verify the Configuration:
* Use the following ONTAP command to verify the HA status:
cluster::> storage failover show -fields multipath-ha
* This will display whether the system is in multipath HA or single-path HA mode.
* Check the port connectivity:
cluster::> network port show -node <node_name>
References:
* NetApp Hardware Installation and Setup Guide for AFF A220.
* NetApp Knowledge Base: "Configuring Multipath HA for AFF Systems."
* ONTAP 9.x System Administration Guide: "High Availability Configurations." Understanding Single-Path HA vs. Multipath HA:
* Single-Path HA indicates that only one path exists between the controllers and the connected shelves, leading to limited redundancy.
* Multipath HA requires both controllers to have redundant SAS connections to the shelves.
Cabling for Multipath HA in AFF A220 Systems:
* To achieve multipath HA, you must connect 0c and 0d on both controllers to the appropriate stack ports on the shelves.
* This ensures dual paths for each controller to access the storage shelves.
NetApp Reference Documentation:
* Refer to the "ONTAP Multipath HA Configuration Guide" and the "NetApp Hardware Installation Guide" for AFF A220 systems for cabling diagrams and best practices.

NEW QUESTION # 20
During which two operations is the NVRAM replayed by the high-availability (HA) partner? (Choose two.)

A. when the node loses power
B. after triggering a sync core
C. when a node is halted
D. during a negotiated takeover

Answer: A,D

Explanation:
* Description:
* When a negotiated takeover occurs (e.g., for maintenance or upgrades), NVRAM data is replayed by the HA partner to ensure no data is lost.
* Relevance:
* This ensures that all pending writes are safely processed by the partner node.
1. During a Negotiated Takeover:
* Description:
* If a node loses power unexpectedly, the HA partner replays the mirrored NVRAM data to protect active write operations.
2. When the Node Loses Power:
* A. after triggering a sync core:
* Triggering a sync core does not involve NVRAM replay; it captures the system state for debugging.
* B. when a node is halted:
* Halting a node does not trigger NVRAM replay unless it is part of a negotiated takeover.
Why Other Options Are Incorrect:
* "ONTAP High Availability Guide" explains NVRAM mirroring and replay during failover scenarios.
References:

NEW QUESTION # 21
What happens when the command diskcopy is run from nodeshell?

A. It copies the disk content to a specified volume.
B. It performs a low-level copy of the disk to another disk.
C. It triggers a RAID reconstruction of that disk.
D. It pre-fails a drive in an aggregate and copies it to a spare.

Answer: B

Explanation:
Purpose of the diskcopy Command:
* The diskcopy command is used in the ONTAP nodeshell environment to perform a low-level sector-by- sector copy of data from one disk to another. This is typically used during data recovery or diagnostics.
How It Works:
* The command copies all sectors from the source disk to the destination disk without any regard for file system or metadata structures.
* It is commonly used when replicating the exact state of a failing disk to a spare for further analysis or recovery.
Key Notes:
* The destination disk must be of the same or larger capacity than the source disk.
* The operation is typically disruptive and not suitable for production use.
NetApp Reference Documentation:
* Found in the "ONTAP Command Line Manual" for nodeshell utilities. The diskcopy process is highlighted as a low-level disk cloning operation.

NEW QUESTION # 22
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. rdfile /mroot/etc/log/SSRAM
B. event log show
C. pelog -a -g=2
D. show pci -v

Answer: A,C

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 # 23
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