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최신 Storage Administrator D-VPX-OE-A-24 무료샘플문제 (Q39-Q44):
질문 # 39
At which stage of configuring a virtual volume on VPLEX is the RAID level defined?
정답：C
설명：
The RAID level for a virtual volume on VPLEX is defined at the device stage. Here's the explanation:
* Claimed Volume: This is the initial stage where a physical volume from a storage array is claimed by VPLEX. At this point, no RAID configuration is applied.
* Extent: After claiming the volume, VPLEX divides it into extents, which are logical subdivisions of the claimed volume. Extents still do not have RAID configurations.
* Device: This is the stage where RAID is applied. A VPLEX device is created from one or more extents, and it is at this point that the RAID level is defined.The device can be configured with various RAID levels, depending on the desired performance and redundancy requirements1.
* Storage Volume: The term 'storage volume' typically refers to the physical storage on the array before it is claimed by VPLEX. It does not have a RAID level associated with it until it is claimed and turned
* into a VPLEX device.
By defining the RAID level at the device stage, VPLEX allows for flexibility and resilience in how data is stored and protected across the storage infrastructure.
질문 # 40
A storage administrator has been tasked with migrating a Microsoft SQL Server and its native EMC VNX LUNs behind a VPLEX Local cluster. However, in planning for future application growth, the database administrator wants to be able to expand the storage volumes.
Based on this information, which geometry should be selected during encapsulation?
정답：A
설명：
For migrating a Microsoft SQL Server and its native EMC VNX LUNs behind a VPLEX Local cluster with the ability to expand storage volumes in the future, the recommended geometry during encapsulation is 1:1 mapping.This approach allows for each storage volume to be directly mapped to a virtual volume, preserving the data in its current state and simplifying future expansions1.
* 1:1 Mapping: This geometry ensures that each back-end storage volume is encapsulated into a corresponding virtual volume in VPLEX.It maintains a direct relationship between the physical LUN and the virtual volume1.
* Future Expansion: With 1:1 mapping, expanding a virtual volume is straightforward because it involves expanding the underlying storage volume on the array and then resizing the corresponding virtual volume in VPLEX1.
* Encapsulation Process: During encapsulation, the storage administrator can prepare many tasks ahead of time, such as host zoning to VPLEX FE ports, host registration of initiators in VPLEX, and LUN masking/zoning to the VPLEX BE Ports.The cutover process then becomes a quick procedure to switch the volumes1.
* EZ Provisioning Wizard: After claiming and encapsulating the LUNs, the administrator can create a
1:1 mapping of Storage volume to virtual volume with the EZ Provisioning Wizard, which is a quick process and helps preserve the data in its current state1.
* Simplifying Management: By using 1:1 mapping, the storage administrator simplifies the management
* of storage volumes and ensures that the SQL Server can be easily expanded to accommodate future application growth1.
By selecting 1:1 mapping during the encapsulation process, the storage administrator ensures that the system is prepared for future growth and that storage volumes can be expanded without complications.
질문 # 41
What are characteristics of a storage view?
정답：A
설명：
A storage view in Dell VPLEX is a logical construct that defines the visibility and access relationships between hosts (initiators), storage (virtual volumes), and VPLEX front-end (FE) ports. Here's a detailed explanation of the characteristics:
* Initiator Multiplicity:An initiator, which is typically a host's HBA (Host Bus Adapter) port, can indeed be part of multiple storage views. This allows a single host to access different sets of virtual volumes through different storage views.
* VPLEX FE Port Multiplicity:VPLEX FE ports can also be included in multiple storage views. This design provides flexibility in connecting multiple hosts to various virtual volumes through shared FE ports.
* Initiator and FE Port Pairing:While both initiators and FE ports can exist in multiple storage views, each unique initiator and FE port pair can only be part of one storage view. This rule ensures that the path from a host to a virtual volume through a specific FE port is uniquely defined, preventing any ambiguity in the data access path.
References:
* The Dell VPLEX documentation outlines the concept of storage views and their characteristics, emphasizing the importance of properly configuring storage views to ensure correct visibility and access control between hosts and storage resources1.
* Best practices guides and technical whitepapers provided by Dell further explain how to configure storage views in VPLEX, detailing the relationships between initiators, FE ports, and virtual volumes1.
By understanding these characteristics, a VPLEX storage administrator can effectively manage access to storage resources, ensuring that hosts have the necessary visibility to the virtual volumes they require for their operations.
질문 # 42
How are physical ports numbered for each I/O module in VS6 VPLEX hardware?
정답：B
설명：
* Physical Port Numbering: Physical ports on I/O modules are numbered to provide a unique identifier for each port. This numbering is important for configuration, management, and troubleshooting purposes.
* Director Modules: In VPLEX hardware, director modules are key components that manage data flow and connectivity. Each director module contains I/O modules with multiple physical ports.
* Numbering Convention: The numbering convention for physical ports may start from either the top or the bottom of the I/O module, depending on the design specifications provided by the manufacturer1.
* VS6 VPLEX Hardware: For the VS6 VPLEX hardware, the specific numbering of physical ports for each I/O module would be detailed in the official Dell VPLEX documentation, which would provide diagrams and descriptions of the hardware components2.
* Configuration and Setup: Understanding the physical port numbering is crucial for the proper configuration and setup of the VPLEX system, as it affects zoning, mapping, and other storage network configurations3.
Since the exact numbering of physical ports for each I/O module in VS6 VPLEX hardware is not provided in the search results, it is recommended to consult the official Dell VPLEX documentation or contact Dell support for verified information.
-date and official guidance.
질문 # 43
LUNs are being provisioned from an ALUA-capable back-end array to VPLEX. What is the path requirement for each VPLEX director when connecting to this type of array?
정답：B
설명：
When provisioning LUNs from an ALUA-capable back-end array to VPLEX, it is required that each VPLEX director has at least two paths to both the active and non-preferred array controllers. This ensures redundancy and continuous availability of data even if one path or controller fails.
* ALUA-Capable Arrays: ALUA (Asymmetric Logical Unit Access) arrays present active and non-preferred (or passive) paths to the storage.The active paths are used for I/O under normal operations, while non-preferred paths are available for use if the active paths fail1.
* Path Requirements: For each VPLEX director, there should be at least two paths to the active controller and at least two paths to the non-preferred controller.This configuration provides redundancy and supports the ALUA functionality1.
* VPLEX Director Connectivity: VPLEX directors manage the paths to the storage arrays.Having multiple paths from each director ensures that VPLEX can continue to provide access to the LUNs even if there are issues with one of the paths or controllers1.
* Redundancy and Availability: The path requirement is crucial for maintaining high availability and redundancy, which are key benefits of using VPLEX in conjunction with ALUA-capable arrays1.
* Best Practices: Following this best practice for path connectivity aligns with VPLEX's goal of providing continuous data availability and seamless failover capabilities in the event of hardware failures or maintenance activities1.
By adhering to the path requirement of having at least two paths to both the active and non-preferred array controllers, VPLEX can leverage the ALUA functionality of the back-end array to ensure optimal performance and data availability.
질문 # 44
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