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NEW QUESTION # 14
A node has failed.
Which two conditions must be met for an automatic takeover to be triggered? (Choose two.)
Answer: A,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 # 15
Which statement best describes the functionality of RAID Error Propagation (REP)?
Answer: D
Explanation:
Functionality of RAID Error Propagation (REP):
* RAID Error Propagation (REP) ensures that errors on the disk layer, such as unrecoverable read errors, do not propagate as inconsistencies into the WAFL (Write Anywhere File Layout) metadata layer.
* WAFL is designed to manage data blocks, and if an error occurs on a user data block, WAFL can identify and handle it gracefully without flagging an inconsistency.
Why Option A Is Correct:
* REP ensures that errors on a user data block are isolated and do not trigger WAFL inconsistencies.
Instead, the error is handled at the RAID layer or higher without corrupting metadata.
* This design provides a robust mechanism to protect against data integrity issues caused by disk errors.
NetApp Reference Documentation:
* Refer to the "ONTAP Storage Management Guide" and the "NetApp RAID Guide," which explain how RAID and WAFL interoperate and how REP is implemented.
NEW QUESTION # 16
Which two steps are required to replace a drawer in a DS460c shelf? (Choose two.)
Answer: A,D
NEW QUESTION # 17
How do you set environment variables to factory settings?
Answer: C
Explanation:
To reset environment variables to factory settings, the set-defaults command is used. This command clears all customizations and restores the environment variables to their default values.
* Command Syntax:At the LOADER prompt, type:
Key Details:arduino
Copy code
set-defaults
* Effect:This command resets all environment variables (e.g., boot arguments, diagnostic settings) to their original factory defaults.
* B. unsetenv all:
* This command clears all environment variables, but it does not restore them to factory defaults.
* C. setenv factory:
* This is not a valid command in NetApp systems.
* D. wipeconfig:
* This command is used to clear configuration and logs but does not reset environment variables.
Why Other Options Are Incorrect:
* NetApp "System Configuration Guide" confirms the use of set-defaults for restoring environment variables to factory settings.
References:
NEW QUESTION # 18
At what stage is a write acknowledged to a client?
Answer: A
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 # 19
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