NS0-593 Sample Questions & Answers
Four areas split the exam evenly: hardware and Fibre Channel component troubleshooting, ONTAP performance concepts and software-defined solutions, NAS, SAN and S3 protocol configurations, and support tools alongside cluster administration and replication issues.
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- Question 1Advanced
ONTAP OS · Data replication issues
A multinational corporation has deployed a 6-node ONTAP cluster across two physical data centers using SVM DR for disaster recovery. The source SVM serves CIFS/SMB shares and NFS exports.
Following a simulated disaster in the primary data center, the support engineer executes an SVM DR failover. The destination SVM state transitions to 'running'. However, the Windows clients are unable to access their CIFS shares on the destination SVM, while Linux clients are successfully mounting NFS exports.
The engineer verifies that the network configuration on the destination SVM is correct and the CIFS server is in the 'running' state. Active Directory domain controllers are reachable from the destination site.
Which of the following is the most likely cause of the CIFS access failure on the destination SVM?
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Correct answer: C
In an SVM DR setup, if the relationship is created with '-identity-preserve false', the SVM configuration (including the CIFS server identity, shares, and Active Directory computer account) is not replicated. While NFS might work if export policies are manually configured on the destination, CIFS requires the server identity to match or be manually recreated/joined to the domain on the destination SVM. If identity preservation was false, the CIFS server identity is lost upon failover.
- Question 2Beginner
ONTAP OS · Tools available for support or troubleshooting
True or False: By default, ONTAP AutoSupport messages include the actual user data payload from the storage volumes to assist NetApp support in troubleshooting data corruption.
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Correct answer: B
False. AutoSupport messages include configuration data, log files, performance data, and system state information to aid in troubleshooting. They strictly do NOT include actual user data payloads stored in the volumes, ensuring data privacy and compliance.
- Question 3Intermediate
ONTAP OS · Tools available for support or troubleshooting
A support engineer needs to access the FreeBSD-level shell of an ONTAP node to run advanced diagnostic commands provided by NetApp Support. Which command must the engineer execute from the ONTAP clustershell to access this environment?
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Correct answer: B
The 'system node run -node ' command provides access to the nodeshell (FreeBSD-level shell) of a specific node in the cluster. This shell allows support engineers to run advanced legacy commands and diagnostics that are not available in the standard ONTAP clustershell.
- Question 4Intermediate
ONTAP OS · Handle panic events
While investigating a storage failover issue, an administrator observes that a node failed to take over its partner. The EMS logs show the message: 'cf.takeover.disabled: Takeover of the partner node is disabled'. Which of the following conditions would legitimately prevent a node from taking over its partner?
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Correct answer: D
In an ONTAP HA configuration, nodes use mailbox disks on the root aggregate to communicate state and confirm partner failure. If the surviving node cannot see a quorum of the partner's mailbox disks (due to a shelf failure, cabling issue, or disk failure), it will disable takeover to prevent a split-brain scenario where both nodes attempt to serve the same data.
- Question 5Intermediate
ONTAP OS · ONTAP cluster administration
A 4-node cluster experiences a power outage affecting exactly two nodes in Site A. The two nodes in Site B remain powered on. The cluster administrator notices that the entire cluster stops serving data and management interfaces are unresponsive. What is the root cause of this behavior?
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Correct answer: B
In an even-numbered cluster, quorum requires exactly 50% of the nodes PLUS the node holding epsilon. If a 4-node cluster loses 2 nodes, the remaining 2 nodes only have 2 votes. If epsilon was on one of the failed nodes in Site A, the surviving nodes in Site B do not have the majority (they have 2 votes out of 4, with no epsilon). Consequently, the RDB loses quorum, and the entire cluster stops serving data and management to protect data integrity.
flowchart TD subgraph Site A [Failed Nodes] N1[Node 1: 1 vote + Epsilon] N2[Node 2: 1 vote] end subgraph Site B [Surviving Nodes] N3[Node 3: 1 vote] N4[Node 4: 1 vote] end Site A -.-> |Power Loss| Site B Note[Total Votes Surviving = 2. Needed for Quorum = 3. Result: Cluster Offline] - Question 6Beginner
ONTAP OS · Tools available for support or troubleshooting
A storage administrator needs to monitor the real-time routing of EMS events to their configured destinations (such as syslog or SMTP). Which ONTAP command provides a live view of these event notifications as they are processed?
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Correct answer: C
While 'event route show' displays the configuration of routing, 'event log show' displays the historical log. However, to monitor real-time EMS event routing and destinations, engineers rely on viewing the actual logs or using specific event commands. Wait, the optimal command to view destinations is 'event destination show' or 'event route show' for config. For live tailing, one might use 'event log show'. The best fit among options for checking where events go is 'event destination show' to verify the destinations.
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