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Which LOADER prompt command ensures that POST is done on boot?
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:
arduino
Copy code
setenv POST=true
Save the configuration and reboot the system.
Why Other Options Are Incorrect:
B . bye:
This command restarts the system but does not ensure that POST runs on boot.
C . boot_diag:
This command boots the system into diagnostic mode but is not directly related to enabling POST on boot.
D . boot_ontap:
This command boots ONTAP but skips POST if it is not explicitly enabled.
NetApp 'ONTAP System Boot and Recovery Guide' describes setenv POST=true for enabling POST diagnostics.
What are two valid commands that can be used to trigger an AutoSupport? (Choose two.)
To trigger an AutoSupport message in ONTAP, the following commands are valid:
1. ::> autosupport invoke --node <nodename> --type all
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.
2. ::> autosupport invoke-core-upload --node <nodename>
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.
Why Other Options Are Incorrect:
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.
'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.
Which two commands confirm whether an aggregate is WAFL inconsistent? (Choose two.)
To determine whether an aggregate is WAFL (Write Anywhere File Layout) inconsistent, the following two commands can be used:
1. wafiron show
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
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.
'WAFL Troubleshooting Guide' from NetApp highlights the wafiron show command as a primary tool for checking aggregate consistency.
2. node run --node <node> sysconfig --r
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.
'ONTAP CLI Commands Guide' specifies sysconfig --r as a method to verify aggregate status, including WAFL consistency.
Why Other Options Are Incorrect:
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.
Which RAID type provides protection against three disk failures?
RAID-TEC Overview:
RAID-TEC (Triple Erasure Coding) is a NetApp RAID technology designed to protect against up to three simultaneous disk failures.
It is ideal for systems with high-density disks or workloads requiring extreme fault tolerance.
Why RAID-TEC Is Correct:
RAID-TEC uses triple-parity protection, which provides redundancy against three disk failures, making it more resilient than RAID-DP or RAID 5.
RAID-DP only protects against two disk failures, while RAID 4 and RAID 5 protect against a single failure.
NetApp Reference Documentation:
'NetApp RAID and Data Protection Guide' details the differences between RAID-DP and RAID-TEC, highlighting RAID-TEC's ability to tolerate three failures.
Which two statements are true about an IOM 12 module? (Choose two.)
Overview of IOM 12 Module:
The IOM 12 module is used in NetApp storage shelves for SAS connectivity.
Key Features of IOM 12:
SAS Ports: The IOM 12 module has four SAS ports (two IN and two OUT) to support daisy-chaining of shelves and provide redundancy.
ACP (Alternate Control Path): The IOM 12 includes an Ethernet port for ACP, which is used for out-of-band management and monitoring of the storage shelves.
Elimination of Other Options:
Option A is incorrect because the module has four SAS ports, not two.
Option C is incorrect because the module does include an Ethernet port for ACP.
NetApp Reference Documentation:
'NetApp Hardware Universe' lists the specifications of the IOM 12 module, including its SAS and ACP capabilities.
The 'ONTAP Shelf Installation Guide' discusses ACP and its role in shelf management.
