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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Troubleshooting & Support | 25% | - Problem isolation and root cause analysis
|
| Topic 2: Hardware Components & Replacement | 30% | - FRU identification and procedures
|
| Topic 3: ONTAP Operating System | 20% | - Core architecture and components
|
| Topic 4: Tools & Documentation | 10% | - Using NetApp support resources
|
| Topic 5: Data Protection & High Availability | 15% | - Snapshot, replication, and disaster recovery
|
>> Exam NS0-094 Revision Plan <<
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NEW QUESTION # 20
At what stage is a write acknowledged to a client?
Answer: B
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:
References: 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.
NEW QUESTION # 21
What are two valid commands that can be used to trigger an AutoSupport? (Choose two.)
Answer: B,C
Explanation:
To trigger an AutoSupport message in ONTAP, the following commands are valid:
* What it does : This command manually triggers a complete AutoSupport message of type "all." This includes logs and system information from all subsystems.
* How to use :
* Run the command: autosupport invoke -node < nodename > -type all
* Replace < nodename > with the name of the node for which you want to generate the AutoSupport message.
* Why it's relevant : This is the primary method for triggering a full AutoSupport message manually. It is commonly used during troubleshooting to provide comprehensive system data to NetApp Support.
1. :: > autosupport invoke -node < nodename > -type all
* What it does : This command is specifically used to upload core files (e.g., kernel or user space cores) from a node to NetApp Support for analysis.
* How to use :
* Run the command: autosupport invoke-core-upload -node < nodename > .
* Replace < nodename > with the name of the node for which you want to upload core files.
* Why it's relevant : If there is a system panic or other critical issue, this command ensures that core files are included in the AutoSupport message for detailed analysis.
2. :: > autosupport invoke-core-upload -node < nodename >
* A. :: > autosupport history show-upload-details -node < nodename > :
* This command displays the history of AutoSupport uploads but does not trigger a new AutoSupport.
* B. :: > system node coredump upload -node < nodename > :
* This command uploads coredumps directly to a support server but does not trigger an AutoSupport message.
Why Other Options Are Incorrect:
References: "ONTAP 9 AutoSupport Configuration Guide" confirms autosupport invoke as a valid command to trigger AutoSupport messages.
"ONTAP CLI Reference Manual" specifies autosupport invoke-core-upload for core file uploads.
NEW QUESTION # 22
Which LOADER prompt command ensures that POST is done on boot?
Answer: C
Explanation:
To ensure that POST (Power-On Self-Test) runs on boot, the setenv POST=true command is used at the LOADER prompt. This command enables the system to perform POST diagnostics before proceeding with the boot process.
Key Details:
POST Purpose: POST checks system hardware components (such as memory, disk, and controllers) for faults before loading the ONTAP kernel.
How to Use:
At the LOADER prompt, type:
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setenv POST=true
Save the configuration and reboot the system.
NEW QUESTION # 23
Which two statements are correct when describing L1 and L2 Watch Dog Resets (WDR)? (Choose two.)
Answer: B,C
Explanation:
* Description :
* L1 WDR is a hardware-initiated reset that occurs when the system detects an unrecoverable error or lockup lasting 0.5 seconds .
* Key Characteristics :
* It performs a hard reset , meaning the system immediately reboots without creating a core dump.
1. L1 Watchdog Reset (WDR):
* Description :
* L2 WDR is initiated when the system fails to recover from a critical fault after 2 seconds .
* Key Characteristics :
* It requests a core dump to capture the system state for diagnostic purposes before performing a reset.
2. L2 Watchdog Reset (WDR):
* B. L1 WDR is initiated after 0.5 seconds from the event :
* This is incorrect because L1 WDR performs a hard reset and does not initiate after 2 seconds.
* C. L1 WDR performs a soft reset :
* This is incorrect because L1 WDR performs a hard reset , not a soft reset.
Why Other Options Are Incorrect:
References: "ONTAP Panic Analysis Guide" describes the behavior and timing of L1 and L2 WDR events.
NetApp Support documentation on system resets explains the differences between L1 and L2 watchdog resets.
NEW QUESTION # 24
What is the default amount of time that a volume is available for recovery from the volume recovery queue following a volume deletion?
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:
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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:
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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 .
:
NetApp Knowledge Base Article: "How to use the Volume Recovery Queue" .
NetApp ONTAP Documentation: Volume Recovery and Data Management Procedures.
NEW QUESTION # 25
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