NetApp Certified Support Engineer – ONTAP Specialist
You have proven skills in troubleshooting, analyzing, and remediating NetApp® Data ONTAP Storage Systems.

NCSE ONTAP Specialist logos and certificates will be granted to those individuals who successfully obtain the NetApp Certified Support Engineer (NCSE) certification, then pass the NetApp Certified Support Engineer – ONTAP Specialist (NS0-591) exam.

NS0-591
NetApp Certified Support Engineer—ONTAP Specialist

We recommend that NetApp Certified Support Engineer—ONTAP Specialist candidates have six to 12 months of experience with troubleshooting, analysis, and resolution of NetApp Data ONTAP Storage Systems.

Recommended Training and Resources:
ONTAP Troubleshooting (ILT)
Practice Test for NS0-591
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Reference document (PDF)
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NS0-591
NetApp Certified Support Engineer – ONTAP Specialist

The NS0-591 exam includes 60 test questions, with an allotted time of 2 hours to complete. In countries where English is not the native language, candidates for whom English is not their first language will be granted a 30-minute extension to the allotted examination completion time.

The NS0-591 exam includes the following topics:

Data ONTAP
Demonstrate knowledge of user space process troubleshooting
Describe WAFL recovery
Demonstrate knowledge of aggregate relocation (ARL) or volume moves
Demonstrate knowledge of quorum troubleshooting
Demonstrate knowledge of cluster or node recovery
Describe storage efficiency

Platform and Storage
Demonstrate knowledge of how to fix faulty storage components
Demonstrate knowledge of how to troubleshoot for SAS/FC-AL cabling issues
Describe how to decode FIFO strings
Demonstrate knowledge how to solve HA hardware issues

Networking and Protocols
Demonstrate knowledge of how to troubleshoot SAN connectivity
Demonstrate knowledge about advanced network troubleshooting
Describe NAS troubleshooting
Describe how to perform packet trace–based troubleshooting
Describe the differences in NFS versions
Describe different SMB features

Performance
Demonstrate knowledge of how to analyze performance issues
Identify WAFL structure

Question: 1
A customer mentions that their intercluster SnapMirror replication operations consistently take
much longer than normal. While troubleshooting, you want to initiate a test SnapMirror session to
collect performance data.
How would you accomplish this task?

A. Run the network test-path command to simulate a SnapMirror connection and record the latency/throughput data.
B. View the active network connections to the node to see if there a large number of active connections.
C. Use the ifstat command to collect network performance data for the physical interface.
D. Run the network statistics lif show command for the intercluster LIF to simulate a network connection.

Answer: A

Question: 2
The root aggregate on your single-node ONTAP cluster failed. You have the configuration backups saved on your FTP server?
In this scenario, which two steps are part of the recovery procedure? (Choose two.)

A. Perform a Netboot using the configuration backup.
B. Create a new aggregate and set its ha_policy option to sfo.
C. Boot into maintenance mode.
D. Create a new root aggregate and set its ha_policy option to cfo.

Answer: C,D

Question: 3
When does ONTAP overwrite a block that contains existing data?

A. after a user edits a file
B. after the block has been marked free
C. when file permissions are changed
D. when a file is copied in a LUN

Answer: D

Question: 4
Your customer has initiated several volume move commands to redistribute the workload in their 8-
node cluster. To verify that this process is not affecting their client access, they were monitoring the
network switches that provide client access, but they do not see the network load of the volume move command.
In this scenario, what is the reason for the behavior?

A. The volume move command uses the HA iWarp interconnect, not the client access switches.
B. The volume move command uses copy offload protocol, so it does not show up when monitored.
C. The volume move command uses the intercluster LIFs, not the data LIFs.
D. The volume move command uses the cluster interconnect switches, not the client access switches.

Answer: B

Question: 5
A customer reports that a takeover has been disabled on an HA pair.
What would be a cause for this to happen?

A. The HA interconnect is not functioning properly.
B. There is a disk running too hot.
C. The interface for the hardware assist has become unavailable.
D. The cluster network is not functioning properly.

Answer: A

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