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The NS0-093 exam is a crucial certification for individuals who want to gain expertise in NetApp storage hardware support. NS0-093 exam covers a wide range of topics, including NetApp hardware and software installation, system configuration, data protection, and data management. NS0-093 exam also evaluates an individual’s ability to diagnose and troubleshoot hardware issues using various diagnostic tools and techniques.
Network Appliance NS0-093 exam is a certification offered by NetApp for hardware support engineers. NS0-093 exam is designed to test the knowledge and skills required to provide high-level technical support for NetApp storage systems. The NS0-093 exam covers a range of topics, from hardware components and troubleshooting techniques to software installation and configuration.
NEW QUESTION # 21
In maintenance mode, which of the following commands shows disk ownership?
- A. aggr status
- B. sysconfig -v
- C. storage show disk -p
- D. disk show -v
Answer: D
Explanation:
In maintenance mode, the command disk show -v provides detailed information about disk ownership. This includes the current owner, previous owner, and disk health status.
* Enter maintenance mode, and run:
How to Use:disk show -v
* The output will display ownership information for each disk, including its RAID group and current assignment.
* A. sysconfig -v:
* This command provides system configuration details but does not show disk ownership.
* C. aggr status:
* This command shows the status of aggregates, not individual disks or their ownership.
* D. storage show disk -p:
* This command is not valid in maintenance mode.
Why Other Options Are Incorrect:
* NetApp "Maintenance Mode Commands Guide" highlights disk show -v as the command to check disk ownership.
References:
NEW QUESTION # 22
Which two of the following methods are valid ways to access a node which is not booting? (Choose two.)
- A. serial console
- B. Service Processor
- C. cluster management port
- D. node management port
Answer: A,B
Explanation:
If a node is not booting, the following methods can be used to access the system for troubleshooting:
* What it does:The SP provides out-of-band management access to the node, even if the node is not booting.
* How to use:
* Connect to the SP using SSH or a direct console connection.
* Use SP commands to gather logs or perform diagnostics.
1. Service Processor (SP)
* What it does:The serial console provides direct access to the node's bootloader or maintenance mode.
* How to use:
* Connect to the serial port using a terminal emulator.
* Use console commands to interact with the system.
2. Serial Console
* A. node management port:
* The node management interface is only accessible if the node is booted and ONTAP is running.
* B. cluster management port:
* The cluster management interface requires the cluster to be operational, which is not possible if the node is not booting.
Why Other Options Are Incorrect:
* NetApp "Service Processor and Serial Console Guide" provides instructions for accessing a non- booting node.
References:
NEW QUESTION # 23
On a NetApp FAS9000 system, which two field replaceable units (FRUs) are supported for replacement without takeover? (Choose two.)
- A. I/O module
- B. caching module
- C. NVRAM module
- D. DCPM module
Answer: A,C
Explanation:
FRUs on FAS9000 Supporting Replacement Without Takeover:
* A (I/O Module): I/O modules can be replaced hot (without takeover) to maintain system uptime during hardware servicing.
* D (NVRAM Module): NVRAM modules on FAS9000 can also be replaced without a node takeover, ensuring data integrity during replacement.
Why Other Options Are Incorrect:
* B (DCPM Module): The DCPM (Data Center Power Management) module is not hot-swappable and requires a node takeover.
* C (Caching Module): The caching module is integrated and typically requires a node takeover or power-down for replacement.
NetApp Reference Documentation:
* Refer to the "NetApp FAS9000 Hardware Service Guide" for supported FRU replacement procedures and operational constraints.
NEW QUESTION # 24
Which two factors can increase the chances of experiencing a NetApp WAFL inconsistency on an aggregate?
(Choose two.)
- A. constantly running at high load
- B. ignoring NetApp Active IQ health risks
- C. using outdated disk firmware
- D. upgrading frequently
Answer: B,C
Explanation:
* A. Ignoring NetApp Active IQ health risks
* Explanation:NetApp Active IQ provides proactive monitoring and alerts for system health risks, including risks related to WAFL inconsistencies. Ignoring these alerts can lead to unresolved issues such as metadata corruption, hardware failures, or system misconfigurations, increasing the chances of WAFL inconsistencies.
* Examples of Active IQ Risks:
* Disk health warnings.
* High write latency or metadata bottlenecks.
* Aggregates running out of space.
* C. Using outdated disk firmware
* Explanation:Outdated disk firmware can cause performance issues, drive failures, or incorrect handling of I/O operations, potentially leading to WAFL inconsistencies. Disk firmware updates often include fixes for critical issues that improve reliability and prevent data corruption.
* Importance:Keeping firmware updated ensures compatibility with ONTAP and minimizes risks of disk-level errors that can propagate to WAFL.
Why the Other Options Are Incorrect:
* B. Constantly running at high load:
* Running at high load can impact performance but does not directly cause WAFL inconsistencies.
WAFL is designed to handle high I/O loads efficiently.
* D. Upgrading frequently:
* Frequent upgrades, when performed correctly, do not increase the chances of WAFL inconsistencies. However, improperly executed upgrades or skipping recommended steps might introduce risks.
References:
* NetApp Knowledge Base: Articles on Active IQ health checks and disk firmware management.
* ONTAP System Administration Guide: Recommendations for preventing WAFL inconsistencies.
NEW QUESTION # 25
Which two commands confirm whether an aggregate is WAFL inconsistent? (Choose two.)
- A. wafiron show <aggregate>
- B. storage aggregate show
- C. node run -node <node> sysconfig -r
- D. node run -node <node> sysconfig -a
Answer: A,C
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 # 26
A node has failed.
Which two conditions must be met for an automatic takeover to be triggered? (Choose two.)
- A. The cluster network must be available.
- B. NVRAM must be synchronized.
- C. Mailbox disks must be reachable.
- D. The combined utilization of both nodes must be less than 100%.
Answer: B,C
Explanation:
For an automatic takeover to occur in an HA pair, the following conditions must be met:
* The HA pair uses mailbox disks to coordinate and ensure that both nodes have consistent cluster state information.
* If the mailbox disks are not reachable, the takeover process cannot proceed.
1. Mailbox Disks Must Be Reachable:
* The nodes in an HA pair continuously mirror NVRAM data to ensure that writes are protected.
* If NVRAM is not synchronized, the takeover cannot safely handle active workloads.
2. NVRAM Must Be Synchronized:
* A. The combined utilization of both nodes must be less than 100%:
* This is not a requirement for automatic takeover. ONTAP can handle higher utilization during failover scenarios.
* B. The cluster network must be available:
* While the cluster network is critical for normal operation, takeover can still occur if the cluster network is unavailable, as long as the HA interconnect is operational.
Why Other Options Are Incorrect:
* NetApp "ONTAP High Availability Guide" outlines the requirements for automatic takeover in HA pairs.
* "ONTAP NVRAM Synchronization and Failover Guide" explains NVRAM mirroring requirements.
References:
NEW QUESTION # 27
On an AFF A700 system, a SAS stack is connected to SAS ports 2a and 2b. The system has an additional 4- port SAS card in slot 9.
How should the cabling the corrected for best practices?
- A. Use port 2a and 9b.
- B. Use port 2a and 9a.
- C. Use port 2a and 2c.
- D. Use port 2b and 9d.
Answer: B
NEW QUESTION # 28
Which two commands from the Service Processor can provide information about installed field replaceable units (FRUs)? (Choose two.)
- A. system sensors show
- B. system fru show
- C. system power status
- D. system fru list
Answer: B,D
Explanation:
To view information about installed Field Replaceable Units (FRUs) using the Service Processor, the following commands are used:
* What it does:Displays a list of all installed FRUs, such as disks, power supplies, and fans.
* Example Usage:
1. system fru listsystem fru list
* What it does:Provides detailed information about specific FRUs, including serial numbers, statuses, and hardware details.
2. system fru showsystem fru show
* C. system sensors show:
* This command displays sensor data (e.g., temperature, voltage) but does not list FRUs.
* D. system power status:
* This command shows power supply status but does not provide FRU details.
Why Other Options Are Incorrect:
* "Service Processor Commands Guide" from NetApp provides a comprehensive overview of system fru list and system fru show.
References:
NEW QUESTION # 29
What happens when the command diskcopy is run from nodeshell?
- A. It performs a low-level copy of the disk to another disk.
- B. It pre-fails a drive in an aggregate and copies it to a spare.
- C. It copies the disk content to a specified volume.
- D. It triggers a RAID reconstruction of that disk.
Answer: A
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 # 30
You have identified that the file named quarterly_25.docx is inconsistent.
Which nodeshell command reports whether there are Snapshot copies available?
- A. "priv set diag; file check -v <voiname> -i <field>"
- B. "priv set advanced; file check -f quarterly_25.docx"
- C. "priv set advanced; aggr wafliron start -f quarterly_25.docx"
- D. "priv set diag; snap list -f quarterly_25.docx"
Answer: A
NEW QUESTION # 31
What are the two steps to unfail a disk in maintenance mode? (Choose two.)
- A. Use the "disk unfair command.
- B. Use the disk remove command.
- C. Reseat the disk.
- D. Remove it from the Failed Disk Registry.
Answer: A,D
Explanation:
Steps to Unfail a Disk in Maintenance Mode:
* When a disk is marked as "failed," it is added to the Failed Disk Registry and marked as unusable by the system. Unfailing a disk involves removing it from this registry and resetting its state.
Step 1: Remove the Disk from the Failed Disk Registry
* Use the command: registry remove <disk> to delete the disk from the Failed Disk Registry. This clears its "failed" status.
Step 2: Use the Disk Unfail Command
* Execute the disk unfail <disk> command to reset the disk status and make it available for use.
Key Notes:
* After unfailing, the disk will be treated as a spare and must be reassigned or re-added to an aggregate.
* If the disk remains failed after these steps, physical hardware issues may need to be addressed.
NetApp Reference Documentation:
* The "ONTAP Maintenance Mode Guide" and "Disk Management Guide" provide detailed instructions for handling failed disks and using the disk unfail command.
NEW QUESTION # 32
In which two sections of AutoSupport can you find information to analyze the following panic? (Choose two.) Panic_Message: PCI Error NMI from device(s):ErrSrcID(CorrSrc(0xf00),UCorrSrc(0x18)), RPT(0,3,0):
Qlogic FC 16G adapter in slot 1 on Controller
- A. PCI-HIERARCHY.XML
- B. SSRAM-LOG
- C. ALL-COREDUMP.XML
- D. HA-RASTRACE.TGZ
Answer: B,D
Explanation:
To analyze the provided panic error, the two sections of AutoSupport that are essential for investigation are:
* What it is:HA-RASTRACE.TGZ contains HA (High Availability) system trace logs. It records hardware diagnostics, error traces, and the HA system's response to hardware events. These logs are critical when analyzing hardware-related panics, including those caused by PCI errors.
* Why it's relevant to the panic:In the given panic message, the NMI (Non-Maskable Interrupt) error originates from a Qlogic FC 16G adapter. HA-RASTRACE.TGZ will provide detailed diagnostics, including the error reporting from the HA interconnect and other hardware diagnostics. Specifically, it may include information about how the system detected the PCI fault and any actions taken to protect the system state.
* How to analyze:
* Extract the HA-RASTRACE.TGZ file from the AutoSupport bundle.
* Review hardware-related trace messages for entries associated with the PCI bus or the Qlogic FC adapter.
* Look for specific error codes or keywords like PCI Error, NMI, or Qlogic.
* References:
* NetApp's "AutoSupport Logs and Diagnostics Guide" highlights HA-RASTRACE.TGZ as a primary resource for debugging hardware faults.
* The "Panic Troubleshooting Guide" for ONTAP systems specifies HA-RASTRACE as a key source for identifying NMI-related errors.
1. HA-RASTRACE.TGZ
* What it is:SSRAM-LOG records low-level hardware error details, including PCI device register states and uncorrectable memory errors. It is particularly useful for analyzing errors originating in peripheral hardware like network or storage adapters connected via PCI.
* Why it's relevant to the panic:The panic message explicitly references a PCI Error NMI caused by a Qlogic FC adapter. SSRAM-LOG captures detailed state information for PCI devices, which can help identify whether the fault originated in the adapter hardware, the PCI bus, or another related component.
* How to analyze:
* Extract the SSRAM-LOG from the AutoSupport bundle.
* Search for PCI-related errors, including the specific error source IDs (e.g., ErrSrcID(CorrSrc (0xf00),UCorrSrc(0x18))).
* Review the log entries to confirm the root cause of the NMI.
* References:
* The "Hardware Diagnostics and Troubleshooting Guide for ONTAP" lists SSRAM-LOG as a key file for debugging PCI errors.
* NetApp's documentation on PCI diagnostics emphasizes the use of SSRAM-LOG for validating hardware-level faults.
2. SSRAM-LOG
NEW QUESTION # 33
What is the default amount of time that a volume is available for recovery from the volume recovery queue following a volume deletion?
- A. 24 hours
- B. 12 hours
- C. 48 hours
- D. 72 hours
Answer: B
Explanation:
When a volume is deleted in a NetApp ONTAP system, it is placed in the Volume Recovery Queue. By default, the volume remains in this recovery queue for 12 hours before being permanently deleted. This allows administrators to recover mistakenly deleted volumes within the set retention period.
Explanation of Default Behavior:
* Volume Recovery Queue:
* This is a feature in NetApp ONTAP that acts as a safety mechanism, providing a grace period for recovering deleted volumes.
* The default retention period for volumes in the recovery queue is 12 hours, as confirmed by the NetApp KB: "How to use the Volume Recovery Queue."
* How to Recover a Deleted Volume:
* Administrators can recover a deleted volume as long as it remains in the recovery queue and the retention period has not expired.
* Use the ONTAP CLI command:
arduino
Copy code
cluster::> volume recovery-queue recover -vserver <vserver_name> -volume <volume_name>
* This command restores the volume back to its original state.
* How to Check the Volume Recovery Queue:
* To view volumes in the recovery queue and their expiration times, use:
arduino
Copy code
cluster::> volume recovery-queue show
* Changing the Default Retention Period:
* While the default period is 12 hours, it can be adjusted by administrators to fit specific organizational requirements. This is done via system settings or policies.
Why the Other Options Are Incorrect:
* B. 48 hours: Incorrect. The default retention period is not 48 hours; it is 12 hours by default.
* C. 72 hours: Incorrect. While a custom configuration could allow this, it is not the default.
* D. 24 hours: Incorrect. Although this was previously thought to be the default, NetApp documentation explicitly states it is 12 hours.
References:
* NetApp Knowledge Base Article: "How to use the Volume Recovery Queue".
* NetApp ONTAP Documentation: Volume Recovery and Data Management Procedures.
NEW QUESTION # 34
Which two ONTAP systems support both SSD and SAS disks? (Choose two.)
- A. AFF C190
- B. FAS8200
- C. FAS2750
- D. AFF A220
Answer: B,C
Explanation:
The following ONTAP systems support both SSD and SAS disks:
* Description:
* The FAS2750 is part of NetApp's hybrid storage array product line.
* It supports both SSDs for performance tiers and SAS disks for capacity tiers, making it suitable for mixed workloads.
1. FAS2750
* Description:
* The FAS8200 is an enterprise-level storage system that also supports hybrid configurations with both SSD and SAS drives.
* This system is designed to handle high performance and capacity needs.
2. FAS8200
* A. AFF C190:
* The AFF C190 is an all-flash system and only supports SSDs. It does not support SAS disks.
* C. AFF A220:
* Like the AFF C190, the AFF A220 is also an all-flash system that supports SSDs only.
Why Other Options Are Incorrect:
* NetApp "Hardware Universe" confirms drive support for FAS and AFF systems.
* NetApp product documentation details supported disk types for hybrid and all-flash systems.
References:
NEW QUESTION # 35
You are using wafliron on an aggregate named homedir on a production system.
When is the data on homedir available?
- A. after Phase 4 of wafliron is complete
- B. when the administrator manually onlines the aggregate
- C. when wafliron is started
- D. after the mounting phase of wafliron is complete
Answer: A
Explanation:
When using wafliron to repair WAFL inconsistencies on an aggregate, the aggregate becomes available after Phase 4 of the wafliron process is complete.
* Phase 1: Initial scan to identify inconsistencies.
* Phase 2: Corrects directory and inode structure issues.
* Phase 3: Repairs blocks and metadata.
* Phase 4: Completes final repairs and verification, after which the aggregate can be made available.
Phases of wafliron:
* A. when the administrator manually onlines the aggregate:
* The aggregate cannot be manually brought online until wafliron completes Phase 4.
* B. when wafliron is started:
* Starting wafliron does not make the aggregate available; repairs need to be completed first.
* D. after the mounting phase of wafliron is complete:
* WAFLiron does not have a specific "mounting phase." Mounting happens after Phase 4 completes.
Why Other Options Are Incorrect:
* "NetApp WAFLiron Troubleshooting Guide" explains the availability of the aggregate after Phase 4.
* NetApp Support documentation outlines the phases of wafliron and aggregate recovery.
References:
NEW QUESTION # 36
Which two NetApp tools should be used when troubleshooting the root cause of an unexpected controller reboot? (Choose two.)
- A. ONTAP Mediator
- B. ONTAP CLI
- C. Active IQ Config Advisor
- D. Active IQ Digital Advisor
- E. Active IQ Unified Manager
Answer: B,E
Explanation:
To troubleshoot the root cause of an unexpected controller reboot, the following tools are commonly used:
* What it does:Provides monitoring and performance data for the ONTAP cluster, including historical event logs that may help identify the root cause of a reboot.
1. Active IQ Unified Manager
* What it does:The CLI allows you to gather logs and status information directly from the affected node.
Commands like event log show and system core are essential for identifying the reason behind the reboot.
2. ONTAP CLI
* B. Active IQ Digital Advisor:
* This tool focuses on predictive analytics and proactive recommendations, not troubleshooting unexpected reboots.
* D. ONTAP Mediator:
* This tool is used for managing MetroCluster configurations, not for troubleshooting reboots.
* E. Active IQ Config Advisor:
* This tool checks for configuration best practices but does not provide detailed logs or reboot diagnostics.
Why Other Options Are Incorrect:
* NetApp "ONTAP System Management Guide" emphasizes the use of Unified Manager and CLI for troubleshooting system issues.
References:
NEW QUESTION # 37
Which two steps are required to replace a drawer in a DS460c shelf? (Choose two.)
- A. Power off the shelf.
- B. Disconnect the cable chains from the chassis.
- C. Shut down both nodes.
- D. Evacuate all drives in the drawer.
Answer: B,D
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 # 38
At what stage is a write acknowledged to a client?
- A. when the write is present in the local node RAM and NVRAM
- B. when the write has been flushed to disk
- C. when the write has been flushed from NVRAM to RAM
- D. when the write is present in the NVRAM on the local node and its HA partner
Answer: D
Explanation:
* In a clustered ONTAP system, write requests are acknowledged to the client only after they are securely stored in NVRAM on both the local node and its HA (High Availability) partner.
* This ensures redundancy and data protection in case of a node failure.
Write Acknowledgment in NetApp ONTAP:
* A. when the write is present in the local node RAM and NVRAM:
* Writes are not acknowledged until the HA partner also stores the data in its NVRAM.
* B. when the write has been flushed to disk:
* Writes are acknowledged before they are written to disk, as NVRAM ensures durability.
* D. when the write has been flushed from NVRAM to RAM:
* Data is not acknowledged based on RAM; NVRAM on both nodes is the requirement.
Why Other Options Are Incorrect:
* NetApp's "ONTAP Write I/O Processing Guide" explains the role of NVRAM and HA in write acknowledgment.
* "Data Protection in ONTAP" highlights the synchronization of NVRAM between HA partners.
References:
NEW QUESTION # 39
Which two steps are required to replace a drawer in a DS460c shelf? (Choose two.)
- A. Power off the shelf.
- B. Disconnect the cable chains from the chassis.
- C. Shut down both nodes.
- D. Evacuate all drives in the drawer.
Answer: B,D
NEW QUESTION # 40
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