Key details for this exam, checked against the published exam outline
Each question shows the correct answer and an explanation of why it is right
Refer to the exhibit.
What is the transfer rate in MB/s for disk 19F shown in the exhibit?
The transfer rate for disk 19F shown in the exhibit is 2 MB/s. The exhibit indicates that the scale for 'Disk Bytes/sec' is set to 0.00010000. Given this scale, the displayed value of approximately 200 (in the highlighted blue line) corresponds to 200 x 0.00010000 MB/s, which equals 2 MB/s.
Analysis of the exhibit data and the scale provided.
General understanding of performance monitoring metrics and their interpretations.
What is a characteristic of Data at Rest Encryption in XtremIO?
XtremIO implements Data at Rest Encryption (DARE) to secure data on its SSDs.
This encryption method is designed to prevent unauthorized access to data if the physical media is stolen or lost.
The encryption process involves using a Data Encryption Key (DEK) for each drive, ensuring that data cannot be read without proper authentication.
This feature is crucial for maintaining data integrity and security, especially in scenarios involving sensitive or critical information.
Dell XtremIO Security Guide
Data Encryption at Rest Technical Overview
Which file systems support UNMAP on a Linux server connected to an XtremlO cluster?
For Linux servers connected to an XtremIO cluster, the file systems that support the UNMAP command include Ext3, Ext4, and XFS. The UNMAP command allows these file systems to inform the storage array about blocks that are no longer in use, facilitating better space reclamation and efficiency in storage management.
Dell EMC documentation on XtremIO configurations for Linux environments confirms the support for UNMAP with these specific file systems.
Linux kernel documentation also supports the use of UNMAP/TRIM operations with Ext3, Ext4, and XFS for storage optimization.
A systems administrator is installing a new Microsoft Windows 2012 host and has granted access to a 2 TB LUN from XtremIO. Quick formatting of the XtremIO LUN takes much longer than expected.
What is causing this delay in the formatting process?
VMware vStorage APIs for Array Integration (VAAI) offloads certain storage tasks from the ESXi host to the storage array.
When VAAI is disabled, operations like quick formatting can take significantly longer because the tasks are handled by the host instead of being offloaded to the array.
Quick formatting involves writing zeroes to the entire LUN, and without VAAI, this process is much slower.
Enabling VAAI allows the XtremIO array to handle these operations more efficiently, reducing the time required for tasks like formatting.
Dell XtremIO VMware Integration Guide
VMware VAAI Best Practices with XtremIO
When will an administrator receive an alert when "Small IO Alerts" are set to "enabled"?
When 'Small IO Alerts' are set to 'enabled,' an administrator will receive an alert when I/Os smaller than 8 KB are detected.
This setting helps in monitoring and managing small I/O operations that might affect performance and efficiency on the XtremIO array.
Detecting small I/O operations is crucial for maintaining optimal performance, as these can create overhead and impact the array's efficiency.
Dell XtremIO Monitoring Guide
XtremIO Alerts Configuration Documentation
A systems administrator is responsible for the operations of 20 XtremlO X1 clusters; each are using a standalone XMS server. The administrator wants to consolidate management operations to the minimum number of XMS servers as possible.
What is the smallest number of XMS servers that can support the environment?
A single XtremIO Management Server (XMS) can manage up to 8 X-Brick clusters.
For 20 XtremIO X1 clusters, the smallest number of XMS servers required to support the environment is 4.
Consolidating management operations to the minimum number of XMS servers helps in simplifying administration and monitoring tasks.
Dell XtremIO XMS Configuration Guide
XtremIO Cluster Management Documentation
A systems administrator has been informed that a new backup policy has been put in place for 500 production volumes on an XtremlO X2-R array. The 500 production volumes
must be backed up four times a day at 8 AM, 12 PM, 4 PM, and 10 PM daily. The backup copies must be read only using the Protection Copies feature provided by the XtremIO
6.x code.
How many days of XtremlO Virtual Copy read only volumes can the array store before the original backups are deleted?
7 Days: Given that 500 production volumes must be backed up four times a day using XtremIO's Protection Copies feature, the system can store the read-only volumes for approximately 7 days before the oldest backups are deleted.
This calculation ensures that the array's capacity is used efficiently while adhering to the backup policy requirements.
Dell XtremIO Protection Copies Feature Guide
XtremIO Backup and Recovery Best Practices
Exam domains verified against: Official Dell D-XTR-OE-A-24 exam guide, last checked October 2026.
Storage administrators and IT professionals must understand the capabilities of both XtremIO and X2 systems, including their graphical interfaces with emphasis on X2 updates. You will need to identify various XtremIO and X2 models and contrast their features.
System engineers and storage architects must understand the hardware designs of XtremIO and X2 systems, including Infiniband switch options and backup battery unit options with SuperCap technology. Knowledge of XtremIO X2 configurations and port management is essential.
IT infrastructure specialists and data center technicians must master the installation process for XtremIO and X2 systems. This covers installation resource requirements, component racking for single and dispersed clusters, and cabling procedures for various configurations including power and Storage Controller IP assignment.
System administrators and storage implementation specialists must understand XtremIO Management Server deployment options and related precautions. You will need knowledge of Easy-CLI and XtremApp installation, cluster installation and verification, and ESRS and ESRS VE configuration.
Storage support engineers and maintenance technicians must focus on maintaining XtremIO and X2 systems, including resource identification and power procedures. You will need to understand cluster health states, component failure tolerances, perform Field Replaceable Unit replacements, and use the Technician Advisor tool.
Storage capacity planners and system upgrade specialists must understand the process of expanding clusters online. You will need knowledge of required resources, prerequisites, and step-by-step procedures for expanding from single X-Brick to dual X-Brick and multi-X-Brick configurations.
Common questions about the exam itself
