Free Practice Questions for EMC D-ISM-FN-23 Exam

The controller in an intelligent storage system is responsible for various management functions, including replication and storage management. It acts as the brain of the storage system, coordinating data storage, retrieval, and replication processes to ensure data availability and integrity. Controllers manage both hardware components (such as disks and solid-state drives) and software functions (like data deduplication, compression, and RAID configuration). By managing replication, the controller ensures that data copies are maintained across different storage arrays or locations, providing redundancy and facilitating disaster recovery.

References:

Dell EMC Information Storage and Management V5 Course, Module 4: Intelligent Storage Systems.

Dell EMC ISM V5 Student Guide, Page 78-79.

To secure data replication over a public network, a Virtual Private Network (VPN) is recommended. A VPN creates a secure, encrypted tunnel for data transmission, ensuring the confidentiality and integrity of the data being replicated. This mechanism is crucialfor protecting sensitive information from unauthorized access and ensuring secure communication between sites.References:

Dell EMC Information Storage and Management V5, Module on Data Security and Networking

Scale-out NAS (Network-Attached Storage) systems allow for the horizontal scaling of storage resources by adding more nodes to the storage cluster. Each node contributes additional processing power, storage capacity, and network bandwidth, thereby improving overallperformance and capacity. This architecture provides a flexible and scalable solution to accommodate growing data storage needs.References: Dell Information Storage and Management V5 documents, ExamTopics.

Storage system-based replication creates a point-in-time copy of the source data, allowing for the ability to restore the data from the snapshot. All the snapshots created from a source volume should be the same size for the most efficient use of storage space. Taking multiple snapshots does not necessarily improve the performance of the source volume.

RAID 6 offers a key advantage over RAID 5 in terms of data resiliency. While RAID 5 can tolerate the failure of a single disk, RAID 6 can withstand the failure of two disks simultaneously. This is achieved through the use of dual parity, which provides additional redundancy and ensures data integrity even in the event of multiple drive failures. Although RAID 6 has a higher write penalty compared to RAID 5 due to the additional parity calculations, the increased data protection it offers is a significant advantage for environments where data availability and integrity are critical.

References: Dell Information Storage and Management V5 Course Materials, RAID Levels and Data Protection Section.

Variable-length segment deduplication identifies duplicate data more efficiently than fixed-length segment deduplication because it can adapt to changes in the data. Even if there are minor differences between two documents, the variable-length approach can still recognize and eliminate duplicate segments. This method increases the probability of identifying duplicate data, improving storage efficiency and reducing the amount of data that needs to be stored.References: Dell Information Storage and Management V5, Data Deduplication Techniques,Dell Certification Resource

FCIP (Fibre Channel over IP) is used to extend Fibre Channel networks over IP networks. It connects local Fibre Channel SANs to remote Fibre Channel SANs, enabling long-distance connectivity and disaster recovery solutions.

References: Dell EMC ISM V5 Module 7, "Storage Network Connectivity," provides details on FCIP and its use cases.

Automated storage tiering is a feature of an intelligent storage system that allows data to be moved between tiers of storage based on usage patterns. This can provide better performance and cost savings by ensuring that data is stored in the most appropriate storage tier for its access patterns. For example, data that is frequently accessed can be stored in higher-performing storage tiers, while data that is infrequently accessed can be moved to lower-performing, lower-cost storage tiers.

an interface is a logical connection that enables data transfer between devices. There are different types of interfaces that can connect SSD drives to the storage array controller, such as SATA, SAS, PCIe, and NVMe.

One of the types of interface that can connect SSD drives to the storage array controller is NVMe1. NVMe stands for Non-Volatile Memory Express and it is a protocol that enables high-performance communication between SSDs and PCIe bus. NVMe reduces latency and increases throughput by using multiple parallel queues and direct memory access.

Flow control in FOP (File-Oriented Protocol) is a network performance attribute that ensures that packets are delivered in the same order they were sent. This is achieved by assigning each packet a sequence number, and then having the receiver send an acknowledgment back to the sender that it has received the packet and is ready for the next one. This helps to ensure that packets are not lost, and that they arrive in the same order they were sent.