Free Dell EMC D-XTR-DS-A-24 Exam Actual Questions

The questions for D-XTR-DS-A-24 were last updated On Nov 5, 2024

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Question No. 1

Which host OS supports both 512 bytes and 4 KB XtremIO logical block (LB) volumes?

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Correct Answer: A

The Dell EMC XtremIO X2 storage array offers flexible scaling options with building blocks called X-Bricks1. The system can start with a single X-Brick and scale up to 72 SSDs for a single X-Brick1. When additional performance and capacity are required, the system can be expanded by adding additional X-Bricks1.

Among the options provided, VMware is the host OS that supports both 512 bytes and 4 KB XtremIO logical block (LB) volumes23. VMware vSphere 6.7 and later versions support both 512-byte and 4K logical block sizes23. This is because VMware ESXi detects and registers the 4Kn devices and automatically emulates them as 512e3.

The other options, while they may be part of the overall process, are not specifically known to support both 512 bytes and 4 KB XtremIO logical block (LB) volumes:

Linux typically supports multiple file system block sizes of 512, 1024, 2048, and 40964. However, it's not specifically mentioned that it supports both 512 bytes and 4 KB XtremIO logical block volumes5.

IBM AIX also supports multiple file system block sizes of 512, 1024, 2048, and 40966. But again, it's not specifically mentioned that it supports both 512 bytes and 4 KB XtremIO logical block volumes7.

HP-UX does not specifically mention support for both 512 bytes and 4 KB XtremIO logical block volumes89.

Therefore, the verified answer is A. VMware, as it is the host OS that supports both 512 bytes and 4 KB XtremIO logical block (LB) volumes23.


Question No. 2

What is an accurate statement about XtremIO XVC refresh operations?

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Correct Answer: C

XtremIO XVC (XtremIO Virtual Copies) allows for efficient snapshot management and operations, including the refresh of volumes. One of the key features of XVC is that it enables the refresh of a production volume from a snapshot without requiring the volume to be unmounted from the host. This capability is designed to minimize disruption and maintain continuous availability of data to applications during refresh operations. The refresh operation is handled within the XtremIO storage array, and the production volume remains accessible to the host during this process1.


The Dell XtremIO Design Achievement document provides information on the capabilities and features of XtremIO X2 systems, including XVC operations1.

Additional details on XVC refresh operations can be found in the support documentation for the XtremIO Family on Dell's official website2.

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Question No. 3

When using the XtremIO PoC Toolkit, what is the purpose of the Age phase?

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Correct Answer: B

The purpose of the Age phase in the XtremIO PoC (Proof of Concept) Toolkit is to overwrite each LUN (Logical Unit Number) multiple times to ensure that they contain all unique data. This process is crucial for simulating a real-world scenario where the storage array has been in use for some time, which allows for the evaluation of the performance and behavior of the All-Flash array under more typical conditions1.


The XtremIO PoC Toolkit documentation, which outlines the procedures and phases used during a proof of concept to evaluate the performance and capabilities of the XtremIO storage system1.

Discussions and resources available on professional forums and communities that share insights into the use and stages of the XtremIO PoC Toolkit2.

Question No. 4

What should the Oracle Redo Log block size be set to in order to prevent log entries from being misaligned by read-modify-write operations for an Oracle database?

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Correct Answer: B

The Oracle Redo Log block size is recommended to be set to 8 kB. This is based on the best practices for Oracle 19c Database, where it was found that increasing the size of the Oracle redo logs can improve database performance12. However, it's important to note that not every workload will show significant performance increase when increasing the size of the redo logs. Customers should evaluate the AWR to determine if the redo logs have an associated high number and duration of wait times. If the redo logs show a possible bottleneck, then increasing the size of the redo logs could improve performance2.


Question No. 5

Which software package is required for Fast I/O Failure for the AIX operating system?

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Correct Answer: C

MPIO (MultiPath I/O) is required for Fast I/O Failure for the AIX operating system as it helps in managing multiple paths for redundancy and failover.


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