[2024年06月]更新のD-PWF-DS-23問題集PDFでD-PWF-DS-23リアル試験問題解答
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EMC D-PWF-DS-23 認定試験の出題範囲：
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質問 # 18
An administrator is adding an NVMe device to an existing storage pool They provide the following details in the Add Storage Device to SDS dialog box
* Device Path /dev/disk/by-id'Dell_Express_Flash_NVMe_PM1725_V6TB_SFF_ _S2JPNA0J500141
* Device Name NVMe A. 1.6 TB
* Storage Pool SP-1
What is the result of this action'?
- A. The device name is truncated to "NVMe" and added lo the Storage Pool "SP-t"
- B. The device addition fails due to an invalid path
- C. The device is named "NVMeAt 6 TB" and added to the Storage Pool "SP-1".
- D. The device addition tails due to invalid characters in the name
正解：B
解説：
When adding an NVMe device to an existing storage pool in PowerFlex, the details provided in the "Add Storage Device to SDS" dialog box must be accurate and follow the correct syntax. In the scenario provided, the device path contains an invalid character (an apostrophe) and an incorrect format, which would cause the device addition to fail.
Here's a breakdown of the process and where the error occurs:
Device Path: The device path should be a valid Linux device path, typically starting with /dev/disk/by-id/. The path provided contains an apostrophe (') which is not a valid character in Linux file paths and would result in an error1.
Device Name: The device name should be a simple identifier without spaces or special characters. The name provided, "NVMe A. 1.6 TB", contains spaces and periods, which are not typical for device names and could potentially lead to issues, although the primary cause of failure is the invalid device path1.
Storage Pool: The storage pool name "SP-1" is a valid identifier, but it is contingent on the correct device path and name for the device to be added successfully.
The result of the action, given the invalid device path, would be that the device addition fails. It is crucial to ensure that all details entered in the dialog box adhere to the expected formats and do not contain invalid characters to avoid such failures.
This explanation is based on the standard practices for device path naming conventions in Linux systems and the configuration guidelines for PowerFlex systems as described in Dell's official documentation1. Correcting the device path by removing the invalid character and ensuring the proper format would resolve the issue and allow the device to be added to the storage pool successfully.
質問 # 19
What is the maximum number of SDSs per protection domain of the PowerFlex rack?
- A. 0
- B. 1
- C. 2
正解：A
解説：
The maximum number of Storage Data Servers (SDSs) per protection domain in a PowerFlex rack is 1283. This is specified in the PowerFlex specification sheet and ensures that each protection domain can provide data protection for a significant number of SDSs, allowing for scalability and resilience within the PowerFlex infrastructure.
質問 # 20
An administrator wants to create a NAS Server with Secure NFS which two configuration options are required? (Select 2)
- A. UNIX Directory Service
- B. User Mapping tile
- C. DNS
- D. NFSv3
- E. NFSv4
正解：A、E
解説：
For setting up a NAS Server with Secure NFS, the following two configuration options are required:
NFSv4: This version of NFS includes support for strong security features and is designed to work well over the internet. NFSv4 has integrated security features and supports the Kerberos authentication protocol, which can provide a secure method for client-server interaction1.
UNIX Directory Service: This service is necessary for managing user and group information in a UNIX-like environment. It is essential for NFSv4 as it relies on this information for access control and mapping between users on the client and the server1.
The other options, such as NFSv3 (Option A), do not inherently support the same level of security features as NFSv4. User Mapping file (Option C) and DNS (Option D) are important for NFS configuration, but they are not specifically required for creating a NAS Server with Secure NFS. DNS is crucial for resolving hostnames to IP addresses, but it is not a security feature, and User Mapping file is more related to user identity mapping between different systems.
Therefore, the two required configuration options for creating a NAS Server with Secure NFS are NFSv4 and UNIX Directory Service, as they provide the necessary security and user management capabilities for a secure NFS setup.
質問 # 21
An administrator wants to track total usage on a PowerFlex File system but does not want to impose any restrictions on their users How can this be accomplished using quotas'?
- A. Create a usei quota and set an indefinite grace period
- B. Create a user quota and set both the soft and hard limits to zero
- C. Create a tree quota and set both the soft and hard limits lo zero
- D. Create a tree quota and set an indefinite grace period
正解：C
解説：
To track total usage on a PowerFlex File system without imposing any restrictions on users, an administrator can create a tree quota and set both the soft and hard limits to zero. This method allows the administrator to monitor usage without enforcing any quota limits, thus not restricting user behavior.
Here's how it can be accomplished:
Access the PowerFlex Management Console: Log in to the PowerFlex Management Console where you can manage quotas.
Navigate to the File System: Locate the file system for which you want to track usage.
Create a Tree Quota: Choose to create a new tree quota for the file system.
Set Limits to Zero: When setting up the quota, input zero for both the soft and hard limits. This effectively means there are no limits enforced on the users.
Apply the Quota: Save and apply the quota settings to the file system.
By setting both limits to zero, the administrator can use the quota system purely for monitoring purposes, without affecting user operations. The users will not encounter any quota warnings or limits, but the system will still track and report on the total usage, which the administrator can review.
The rationale behind using a tree quota rather than a user quota is that tree quotas are associated with a directory tree, allowing the tracking of usage across a broader scope, which is more suitable for monitoring overall file system usage.
This approach is consistent with best practices for administering PowerFlex systems as described in the Dell PowerFlex Administration Guide1, which provides detailed procedures for managing storage, including the configuration of quotas for monitoring purposes.
質問 # 22
An administrator is creating a NAS server with a Standalone Windows server. Creation of trie NAS server fails What is the cause of the failure?
- A. DNS was not defined in the NAS server creation wizard
- B. The NAS server is using the same VLAN as block storage networks
- C. FSN has not been added to the cluster
- D. A Storage Pool lor NAS has not been created
正解：D
解説：
The creation of a NAS server requires a dedicated storage pool. If a storage pool specifically for NAS has not been created, the NAS server creation will fail. This is because the NAS server needs to allocate space from a storage pool to store the file system data. Without a designated storage pool, the NAS server cannot be configured properly1.
The other options, while important for the operation and integration of a NAS server, are not directly related to the creation process itself. For instance, using the same VLAN as block storage networks (Option B) may lead to network conflicts, but it would not prevent the creation of the NAS server. Similarly, not defining DNS in the NAS server creation wizard (Option C) could cause resolution issues later on, but it is not a prerequisite for the creation of the NAS server. Lastly, while adding FSN to the cluster (Option D) is a necessary step for enabling file system services, it is not the cause of the NAS server creation failure in this context.
Therefore, the correct answer is A. A Storage Pool for NAS has not been created, as it is a fundamental requirement for the NAS server creation process in a PowerFlex environment.
質問 # 23
What maximum raw capacity can a user expect in a 1U Node while configuring a PowerFlex with an MG pool?
- A. 153.6 TB
- B. 307.2 TB
- C. 76.8 TB
- D. 38 4 TB
正解：D
解説：
The maximum raw capacity that can be expected in a 1U Node while configuring a PowerFlex system with an MG (Multi-Granularity) pool is 38.4 TB. This is based on the typical maximum raw storage capacity available for a 1U node configuration, which is designed to fit within the physical constraints of a 1U rack space while providing a balance of capacity and performance1.
The MG pool in PowerFlex is designed to optimize storage efficiency and performance, and the capacity of a 1U node would be aligned with the specifications that ensure the system's reliability and scalability. The other options listed provide capacities that are generally too high for a single 1U node within the PowerFlex architecture1.
Therefore, the correct answer is A. 38.4 TB, as it represents the realistic maximum raw capacity for a 1U Node in a PowerFlex system with an MG pool.
質問 # 24
Where must a customer go to generate a software troubleshooting bundle?
- A. CloudLmk Center Console
- B. PowerFlex Manager Events and Alerts
- C. PowerFlex Manager Serviceability
- D. iDRAC Lrfecycle Controller
正解：C
解説：
To generate a software troubleshooting bundle for PowerFlex, a customer must navigate to the PowerFlex Manager Serviceability. The steps to generate the bundle are as follows1:
Log in to PowerFlex Manager.
Choose 'Settings' from the menu.
Within the Settings menu, select 'Virtual Appliance Management'.
Choose 'Generate Troubleshooting Bundle'.
In the popup window, the customer has the option to either send the bundle to Configured Secure Remote Services (Secure Remote Services) or download it locally. If downloading locally, select the path for the downloads and enter the appropriate login information, then click 'Generate'.
This process is part of the serviceability features of PowerFlex Manager, which provides tools for system maintenance and troubleshooting. It is important to follow these steps carefully to ensure that the troubleshooting bundle is generated correctly and contains all the necessary information for diagnosing issues within the PowerFlex system.
質問 # 25
What is the correct sequence of steps to create an FG Storage Pool within a PowerFlex system?
正解：
解説：
1 - Create a Protection Domain.
2 - Create a Storage Pool.
3 - Add the SDSs.
4 - Add the SSD devices to the Pool.
5 - Create an Acceleration Pool.
6 - Add the DAX devices to the Pool.
質問 # 26
Which PowerFlex component provides the information that application servers require to connect to the cluster's virtualized storage?
- A. SDS
- B. MDM
- C. SDR
- D. SDC
正解：D
解説：
The PowerFlex component that provides the information application servers require to connect to the cluster's virtualized storage is the Storage Data Client (SDC). The SDC is installed on application servers and is responsible for translating standard block I/O requests from the server's operating system into network I/O requests that can be understood and processed by the PowerFlex storage cluster.
Here's a detailed explanation:
SDC Role: The SDC acts as the interface between the application servers and the PowerFlex storage system. It allows servers to access the virtualized storage as if it were local to the server1.
Connection Process: When an application server needs to connect to the PowerFlex cluster, the SDC communicates with the Meta Data Manager (MDM) to understand the layout of the storage and then interacts with the Storage Data Server (SDS) to perform I/O operations1.
Virtualized Storage Access: Through the SDC, application servers can perform read and write operations on the virtualized storage volumes provided by the PowerFlex cluster, ensuring seamless integration with the existing applications and services1.
The SDC is a critical component in the PowerFlex architecture, enabling the connection and communication between application servers and the PowerFlex storage cluster, thus facilitating the use of virtualized storage resources1.
質問 # 27
A customer has ordered five servers with NVDlMMs Each server has 5 x 3 84 TB SAS and 5 x 3 84 T8 NVMe disks They want to ensure that the highest capacity ot storage is available to the system Which design provides the required storage pool structure''
- A. One Acceleration Pool only
- B. One Acceleration Pool and two Storage Pools
- C. One Storage Pool only
- D. One Storage Pool and one Acceleration Pool
正解：D
解説：
To maximize the storage capacity available to the system while utilizing NVDIMMs, SAS, and NVMe disks, the design should include both a Storage Pool and an Acceleration Pool. The Storage Pool will be used for the bulk storage provided by the SAS disks, while the Acceleration Pool, leveraging the high-speed NVMe disks, will be used to accelerate the performance of the storage system.
The use of NVDIMMs in PowerFlex is associated with enabling fine-granularity storage pools that provide compression, which is beneficial for space efficiency, especially with heavy snapshot use1. This configuration allows for the creation of a storage pool that can take advantage of the NVDIMMs' capabilities for compression and the high capacity of the SAS disks, while the NVMe disks in the Acceleration Pool provide high-performance storage for more demanding workloads.
Therefore, the correct answer is A. One Storage Pool and one Acceleration Pool, as this design will provide the highest capacity of storage available to the system while also ensuring optimal performance through the use of NVMe disks in the Acceleration Pool.
質問 # 28
A customer must restore PowerFlex Manager from a previous backup How can they accomplish this task*?
- A. Run a script outside of PowerFlex Manager
- B. Restore trom the standby MDM
- C. Select Restore Irom the Serviceability page in PowerFlex Manager.
正解：C
解説：
To restore PowerFlex Manager from a previous backup, the customer should select the Restore option from the Serviceability page in PowerFlex Manager. This process is outlined in the Dell PowerFlex Manager documentation and involves the following steps:
Login to PowerFlex Manager GUI: Access the PowerFlex Manager user interface through a web browser.
Navigate to Serviceability: From the dashboard, navigate to the Serviceability page.
Select Restore: On the Serviceability page, locate and select the Restore option.
Provide Backup Details: Enter the necessary details of the backup file that you wish to restore from, such as the filename and location.
Test Connection: Before proceeding with the restore, perform a test connection to ensure that the backup file is accessible.
Initiate Restore: Once the test connection is successful, initiate the restore process.
The restore operation will then proceed, and upon completion, PowerFlex Manager will be restored to the state captured in the backup file. It is important to follow the instructions carefully and ensure that the backup file is correct and not corrupted to avoid any issues during the restoration process1.
This answer is verified as per the Dell PowerFlex Design documents, ensuring that the information provided is accurate and aligns with the official guidelines for restoring PowerFlex Manager from a backup1.
質問 # 29
A customer is adding more storage (o their system that requires compression Which two components are required? (Select 2)
- A. Fine Granularity Storage Pool
- B. At least two SSD disks in each server
- C. Medium Granularity Storage Pool
- D. At least two NVDIMMs in each server
- E. At least two NVMe disks in each server
正解：A、D
解説：
For a PowerFlex system that requires compression, the necessary components include NVDIMMs and a storage pool with fine granularity. Here's why these two components are required:
NVDIMMs: Non-Volatile Dual In-line Memory Modules (NVDIMMs) provide high-speed DRAM performance coupled with flash-backed persistent storage. They are used specifically for compression on PowerFlex storage-only nodes. At least two NVDIMMs per server are required if storage compression is active1.
Fine Granularity Storage Pool: Inline compression in PowerFlex is enabled when using the fine-granularity data layout for storage pools. This granularity level allows for more efficient data compression and storage optimization2.
These components work together to enable compression in the PowerFlex system, ensuring efficient storage utilization and performance. The use of NVDIMMs for compression enhances the system's ability to handle the additional workload associated with compressing data, while the fine granularity storage pool provides the necessary structure for data layout that supports compression12.
質問 # 30
In a test-dev PowerFlex appliance environment, there are two Compute Only nodes five Storage Only nodes, and one Management node An architect wants to create Fault Sets using all available servers but is unable to do so What is the cause of this issue?
- A. A Mote than one Management node is required
- B. There are not enough Storage Only nodes.
- C. There are not enough Compute Only nodes.
正解：B
解説：
In a PowerFlex appliance environment, Fault Sets are used to group Storage Data Servers (SDSs) that are managed together as a single fault unit. When Fault Sets are employed, the distributed mesh-mirror copies of data are never placed within the same fault set1. This means that each Fault Set must have enough SDSs to ensure that data can be mirrored across different Fault Sets for redundancy.
Given that there are only five Storage Only nodes available in the described environment, and considering that each node runs an SDS, it may not be possible to create Fault Sets using all available servers if the number of Fault Sets or the distribution of SDSs across those Fault Sets does not allow for proper mirroring of data. The architecture requires a certain number of SDSs to be available to form a Fault Set that can be used for data mirroring and redundancy1.
The other options, such as requiring more than one Management node (Option A) or not having enough Compute Only nodes (Option C), are not directly related to the creation of Fault Sets. The Management node's primary role is to manage the cluster, not to participate in Fault Sets, and Compute Only nodes do not contribute storage resources to Fault Sets.
Therefore, the correct answer is B. There are not enough Storage Only nodes, as this would prevent the architect from creating Fault Sets that meet the redundancy requirements of the PowerFlex appliance environment.
質問 # 31
Which PowerFlex software allows the cluster to make data available over NAS"
- A. LIA
- B. SDR
- C. SDT
- D. FSN
正解：D
解説：
FSN, or File Storage Network, is the component within the PowerFlex software suite that enables data availability over NAS (Network Attached Storage). It is designed to integrate file services into the PowerFlex system, allowing for the management of file shares alongside block storage within the same infrastructure1.
The FSN component provides the necessary functionality to create, manage, and serve file systems over the network, making it possible for clients to access shared files and directories as if they were local. This integration simplifies the storage architecture and provides a unified storage solution for both block and file data requirements1.
The other options listed, such as SDR (Storage Data Replicator), LIA (Log Integration Adapter), and SDT (Software-Defined Technology), do not specifically relate to the provision of NAS services within the PowerFlex environment. Therefore, the correct answer is A. FSN, as it is the PowerFlex software component responsible for enabling NAS capabilities within the cluster.
質問 # 32
A user is attempting to write tiles to a Power Flex File share The share was created with default settings and contains approximately 15 000 files Ten days ago the number of files exceeded the soft limit quota but is still below the hard limit quota What happens if the user attempts to write a new file to the share location?
- A. The file is written as the hard limit has not been reached.
- B. The file is not written as the maximum number of allowed files has been reached
- C. The file is not written as the grace period has been exceeded.
正解：A
解説：
In PowerFlex File shares, when a soft limit quota is exceeded, it triggers a grace period during which users can still write data to the share. The grace period is a predefined time frame that allows users to either reduce the amount of stored data or to adjust the quota settings. As long as the hard limit quota has not been reached, users can continue to write files to the share, even if the soft limit has been exceeded and the grace period is in effect1.
The soft limit is essentially a warning threshold that alerts users that they are approaching the maximum allowed capacity, but it does not immediately prevent new writes. The hard limit, on the other hand, is a strict limit that, once reached, will prevent any further writes to the share until the stored data is reduced below the hard limit or the quota is increased.
Since the question states that the number of files is still below the hard limit quota, the user will be able to write a new file to the share location. Therefore, the correct answer is C. The file is written as the hard limit has not been reached.
質問 # 33
A customer in a large enterprise environment is planning to deploy hundreds of internally supported third-party nodes over the next six months What PowerFlex platform must be used for this deployment?
- A. Custom node
- B. Rack
- C. Software only
- D. Appliance
正解：C
質問 # 34
An administrator is using SCLI commands to monitor the cluster
On which MDM are the commands performed?
- A. Primary
- B. Standby
- C. Tie-breaKer
- D. Secondary
正解：A
解説：
In a PowerFlex system, the SCLI (ScaleIO Command Line Interface) commands are typically performed on the Primary MDM (Metadata Manager). The Primary MDM is responsible for the overall management and operation of the cluster, including configuration changes and monitoring1. It is the authoritative source for metadata and cluster configuration, making it the primary point of interaction for administrative tasks.
The Tie-breaker and Standby MDMs serve as part of the high availability setup. The Tie-breaker MDM is used to avoid split-brain scenarios, and the Standby MDM is a backup that can take over the role of the Primary MDM if it fails. The Secondary MDM works in conjunction with the Primary MDM to manage the cluster but does not serve as the main point for executing SCLI commands.
Therefore, the correct answer is C. Primary, as it is the MDM where SCLI commands are executed for monitoring and managing the PowerFlex cluster.
質問 # 35
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