Get Dell EMC D-XTR-OE-A-24 Exam Practice Questions - Real and Updated

Answer : B

When dealing with misaligned partitions on XtremIO volumes after upgrading from Windows Server 2003 to Windows Server 2008, the following steps should be taken to realign the data:

Backup the Data: The first and most crucial step is to ensure that all data on the existing partitions is backed up. This is to prevent any data loss during the alignment process.

Run Diskpart: After backing up, use the Diskpart utility, which is a command-line disk partitioning tool that allows you to manage your disk's partitions.

Recreate the Partition: With Diskpart, delete the existing misaligned partition and then create a new partition. When creating the new partition, ensure that it is aligned correctly, typically to a 1MB boundary, which is the default alignment for Windows Server 2008 and newer versions1.

Restore the Data: Once the new partition is created and aligned properly, restore the data from the backup to the newly aligned partition.

This process ensures that the partitions are aligned optimally for the XtremIO storage system, which can help improve performance and efficiency. It's important to note that while tools like Disk Management and Mbralign can be used for managing partitions, they may not provide the necessary functionality to realign existing partitions on Windows Server 2008. Therefore, using Diskpart is the recommended approach1.

Answer : C

When using XtremIO storage arrays for Oracle ASM disk groups, the recommended redundancy type is typically external redundancy. This is because XtremIO arrays are built with inherent data protection and redundancy features that eliminate the need for additional mirroring at the ASM level1.

External Redundancy: With external redundancy, Oracle ASM does not mirror data within the disk group. Instead, it relies on the underlying storage system to provide redundancy and data protection. XtremIO's unique data protection scheme, XDP (XtremIO Data Protection), provides such redundancy1.

XtremIO Features: XtremIO arrays are designed with high levels of fault tolerance and include features like SSD failover and advanced error correction. These features ensure data integrity and availability, making external redundancy a suitable choice1.

Performance Considerations: Choosing external redundancy can also lead to better performance since it avoids the overhead of additional mirroring at the ASM level, which is unnecessary given XtremIO's capabilities1.

Best Practices: Dell EMC recommends using external redundancy for ASM disk groups when using storage arrays like XtremIO that provide their own robust data protection mechanisms1.

In summary, for Oracle ASM disk groups using XtremIO storage arrays, external redundancy (OC) is the recommended setting, as it leverages the array's built-in redundancy features and optimizes performance1.

Answer : C

Configuring Linux hosts to support XtremIO storage involves setting the LUN queue depth to 64.

This configuration ensures optimal performance by allowing the host to handle multiple I/O operations concurrently, matching the capabilities of the XtremIO array.

Proper tuning of the LUN queue depth is crucial for maximizing throughput and minimizing latency in high-performance storage environments.

Dell XtremIO Host Configuration Guide for Linux

Host Configurations in XtremIO Environments

Answer : B

When an XtremIO snapshot is taken of a production volume, it creates two snapshot entities.

These snapshots are identified as S1 and S2.

The creation of S1 and S2 ensures that the data consistency and integrity are maintained while providing a point-in-time copy of the production volume.

These snapshots can be used for various purposes such as backup, testing, or disaster recovery without impacting the performance of the production volume.

Dell XtremIO Snapshots Guide

XtremIO Best Practices for Snapshot Management

Answer : A

Misalignment of data, particularly to the 4k boundaries, can significantly impact write operations on a Linux server connected to an XtremIO storage system. Here's why:

Block Size Alignment: Modern storage systems, including SSDs used in XtremIO arrays, typically use a 4k (4096 bytes) block size for data storage1. This is the smallest unit of data that can be read or written to the storage.

Misalignment Issues: When data is misaligned, it means that the file system's blocks do not line up with the storage device's blocks. This misalignment can cause additional read-modify-write cycles, which can degrade performance and increase latency for write operations1.

Effect on Write Operations: If data is not aligned to the 4k boundaries, the storage system may need to perform extra work to handle the writes, as each write operation could span multiple physical blocks. This results in inefficient use of the storage array's resources and can lead to reduced throughput and increased wear on the SSDs1.

Linux Server Configuration: On a Linux server, ensuring proper alignment is crucial for optimal performance. This can involve configuring the file system and partition alignment during the setup and using tools that can check and correct alignment issues.

In conclusion, misaligned data to the 4k boundaries (OA) is a non-optimal configuration that can have a significant effect on write operations on a Linux server connected to XtremIO. Proper alignment to the storage system's block size is essential for maintaining high performance and longevity of the storage media1.