Master Dell EMC D-XTR-DS-A-24 Exam with Reliable Practice Questions

Correct : C

In an XtremIO X2 cluster, the Disk Array Enclosure (DAE) chassis typically contains two Row Controllers. These Row Controllers are responsible for managing the operations of the SSDs within the DAE and ensuring data availability and integrity. The design of the DAE in an XtremIO X2 cluster is such that it provides a balance between performance, redundancy, and cost-effectiveness, with two Row Controllers being a common configuration for managing the SSDs effectively.

The Dell XtremIO Design Achievement document provides information on the critical components of the XtremIO and X2 systems, including the DAE chassis and its controllers1.

Additional details on the architecture and components of the XtremIO X2 systems can be found in the Introduction to XtremIO X2 Storage Array white paper2.

Correct : 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.

Correct : B

When configuring the iSCSI SAN from the host to the XtremIO cluster, it is recommended to disable flow control features on the server, switches, and array ports. Flow control can cause a performance impact by serializing the flow for iSCSI ports, which is not desirable in high-performance storage solutions like XtremIO1. Disabling flow control ensures that the storage array operates without the limitations that flow control can impose, thus maintaining optimal performance.

Dell EMC Switch Configuration Guide for iSCSI and Software-Defined Storage provides guidelines for the design and configuration of storage networks for iSCSI SAN, which includes recommendations on flow control settings2.

Community discussions on Dell Technologies website where it is mentioned that the latest best practices advise against enabling flow control for iSCSI with XtremIO, as it limits performance1.

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Correct : D

When entering a generic workload into the XtremIO Sizing Tool, the required values are IOPs, I/O size, and bandwidth. These parameters are essential for accurately sizing the storage system to ensure it can handle the expected workload. IOPs (Input/Output Operations Per Second) measure the number of read/write operations the storage system can perform in a second. I/O size refers to the size of each read/write operation, and bandwidth is the total amount of data that can be transferred in a given time frame.

The XtremIO Performance Documents discuss different workload testing parameters, including I/O size and limits, which are relevant to sizing the array1.

The Dell XtremIO Design Achievement document outlines the critical components and best practices for designing solutions with XtremIO and X2 storage systems, which would include considerations for workload sizing2.

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Correct : D

For ESXi disks provisioned by XtremIO, the recommended disk format is 'Eager Zeroed Thick'. This format is preferred because it allocates all the space required for the disk at the time of creation and zeroes out any previous data on the physical media. Compared to other formats, 'Eager Zeroed Thick' provides better performance due to the pre-zeroing of the disk space, which helps in avoiding any latency that might occur during write operations as there is no need to zero out blocks before writing new data.

While the specific Dell XtremIO Design document was not available, the general best practice for high-performance storage solutions like XtremIO is to use 'Eager Zeroed Thick' provisioning for VMs running on VMware ESXi to ensure optimal performance1.

Additional information on disk provisioning and best practices can be found in VMware's official documentation and Dell EMC's storage configuration guides2.

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