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最新的 NetApp Certified NS0-093 免費考試真題 (Q45-Q50):
問題 #45
In a SAS stack of shelves, what is the topology of the connection between expander and disk?
- A. point-to-point
- B. ring
- C. loop
- D. arbritrated loop
答案：A
解題說明：
In a SAS stack of shelves, the connection between the expander and the disk uses a point-to-point topology.
* Point-to-Point:
* Each SAS disk in a shelf connects directly to the expander using a dedicated channel. This ensures that communication between the disk and expander is independent of other disks, improving performance and reliability.
* Why SAS Uses Point-to-Point:
* SAS (Serial Attached SCSI) eliminates the shared bandwidth limitations of traditional bus architectures (e.g., arbitrated loop or ring) by dedicating a connection to each device.
Key Details:
* A. arbitrated loop:
* Arbitrated loop is a topology used in Fibre Channel systems, not SAS.
* C. loop:
* SAS does not use loop-based communication; this is typical of older technologies like SCSI Parallel Interface (SPI).
* D. ring:
* Ring topology is not used in SAS stacks.
Why Other Options Are Incorrect:
* "NetApp SAS Shelf and Disk Configuration Guide" specifies point-to-point communication between expanders and disks in SAS environments.
References:
問題 #46
Your customer notices that their AFF A220 high-availability (HA) system is showing Single-Path HA.
How do you make the system into multipath HA?
- A. 0a and 0c on both controllers should be connected.
- B. 0c and 0d on both controllers should be connected.
- C. 0a and 0b on both controllers should be connected.
- D. 0a and 0d on both controllers should be connected
答案：A
解題說明：
In a NetApp high-availability (HA) configuration, multipath HA ensures redundancy by providing two independent paths from each controller to the connected storage. If the system is currently showing Single- Path HA, it means only one path is operational or connected, which is a potential single point of failure.
To convert the configuration to multipath HA, additional cabling must be configured to establish the second path. For the AFF A220 system, the correct connections are as follows:
Explanation of the Correct answer:
* AFF A220 Port Configuration for HA:
* Each controller in an AFF A220 has ports labeled 0a, 0b, 0c, and 0d for connectivity.
* In a multipath HA configuration, each controller must have two independent paths to the connected storage via the partner controller's disk shelves.
* Correct Cabling for Multipath HA:
* Port 0a on both controllers must be connected to the corresponding port (e.g., disk shelf stack or Inter-Switch Link).
* Port 0c on both controllers must also be connected to complete the redundant path.
* These connections ensure that there are two independent data paths between the controllers and the storage system, providing fault tolerance in case one path fails.
* Single-Path HA to Multipath HA:
* If the system currently shows Single-Path HA, it is likely that only one set of ports (e.g., 0a and
0b) are cabled.
* Adding the additional connections on 0a and 0c establishes the second path required for multipath HA.
Why the Other Options Are Incorrect:
* A. 0a and 0b on both controllers should be connected:
* This option only connects ports 0a and 0b, which does not establish a multipath HA configuration. Port 0c is also required for redundancy.
* C. 0c and 0d on both controllers should be connected:
* Connecting only 0c and 0d would leave ports 0a disconnected, failing to establish a proper multipath HA setup. Both 0a and 0c are required.
* D. 0a and 0d on both controllers should be connected:
* Connecting 0a and 0d is not the standard configuration for multipath HA in an AFF A220 system. Port 0c is part of the required configuration.
How to Verify the Configuration:
* Use the following ONTAP command to verify the HA status:
cluster::> storage failover show -fields multipath-ha
* This will display whether the system is in multipath HA or single-path HA mode.
* Check the port connectivity:
cluster::> network port show -node <node_name>
References:
* NetApp Hardware Installation and Setup Guide for AFF A220.
* NetApp Knowledge Base: "Configuring Multipath HA for AFF Systems."
* ONTAP 9.x System Administration Guide: "High Availability Configurations." Understanding Single-Path HA vs. Multipath HA:
* Single-Path HA indicates that only one path exists between the controllers and the connected shelves, leading to limited redundancy.
* Multipath HA requires both controllers to have redundant SAS connections to the shelves.
Cabling for Multipath HA in AFF A220 Systems:
* To achieve multipath HA, you must connect 0c and 0d on both controllers to the appropriate stack ports on the shelves.
* This ensures dual paths for each controller to access the storage shelves.
NetApp Reference Documentation:
* Refer to the "ONTAP Multipath HA Configuration Guide" and the "NetApp Hardware Installation Guide" for AFF A220 systems for cabling diagrams and best practices.
問題 #47
Which two tools can you use to invoke AutoSupport? (Choose two.)
- A. the NetApp Active IQ website
- B. CLI
- C. the SmartSolve tool
- D. NetApp Cloud Insights
答案：A,B
解題說明：
To invoke AutoSupport in ONTAP, the following tools can be used:
* How to use:Run the command:
1. CLI (Command Line Interface)python
Copy code
autosupport invoke -node <nodename> -type all
* This triggers AutoSupport to collect and send logs and system information.
* How to use:Log in to the Active IQ portal and use its interface to request an AutoSupport message from the connected ONTAP systems.
2. NetApp Active IQ website
* A. NetApp Cloud Insights:
* This tool is used for monitoring and performance analysis, not for triggering AutoSupport messages.
* D. the SmartSolve tool:
* SmartSolve is used for case resolution guidance but does not invoke AutoSupport.
Why Other Options Are Incorrect:
* "ONTAP AutoSupport Guide" provides instructions for invoking AutoSupport via CLI and Active IQ.
References:
問題 #48
You have created a case with NetApp Support for an issue with a DS4246 shelf on an ONTAP 9.12.1 system.
They have requested that you provide shelf logs.
What action do you need to take to collect the shelf logs?
- A. Invoke an autosupport of type all using Active IQ Unified Manager.
- B. Invoke a diagnostic autosupport with the subsystem log_files.
- C. Provide the output of the nodeshell command rdfile/etc/log/shelflog.
- D. Invoke a diagnostic AutoSupport with the subsystem storage.
答案：D
解題說明：
To collect shelf logs for a DS4246 shelf in an ONTAP 9.12.1 system, you must invoke a diagnostic AutoSupport specifically targeting the storage subsystem. This action ensures that detailed storage logs, including shelf logs, are included in the AutoSupport bundle.
* Use the following command:
Steps to Collect Shelf Logs:bash
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system node autosupport invoke -node <node_name> -type diagnostic -subsystem storage Replace <node_name> with the name of the node experiencing the issue.
* This command generates an AutoSupport message that includes logs related to storage subsystems, such as disk shelves and adapters.
* Provide the AutoSupport case number to NetApp Support for further analysis.
* A. Provide the output of the nodeshell command rdfile /etc/log/shelflog:
* While this command allows manual reading of shelf logs, it is not a recommended or comprehensive approach for collecting logs for NetApp Support cases.
* B. Invoke an AutoSupport of type all using Active IQ Unified Manager:
* This action generates a generic AutoSupport bundle, which may not include detailed shelf logs unless explicitly targeted.
* D. Invoke a diagnostic AutoSupport with the subsystem log_files:
* The log_files subsystem targets general system logs, not storage-specific logs like shelf logs.
Why Other Options Are Incorrect:
* "ONTAP 9 AutoSupport and Diagnostics Guide" outlines the use of the subsystem storage option for collecting shelf logs.
* The "Troubleshooting Storage Subsystems" documentation specifies diagnostic AutoSupport as the method for gathering shelf-related logs.
References:
問題 #49
Which two statements are correct when describing L1 and L2 Watch Dog Resets (WDR)? (Choose two.)
- A. L2 WDR requests creation of a core dump before reset.
- B. L1 WDR performs a soft reset.
- C. L1 WDR is initiated after 0.5 seconds from the event.
- D. L2 WDR is initiated after 2 seconds from the event.
答案：A,D
解題說明：
* 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:
* "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.
References:
問題 #50
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