EMC D-ISM-FN-23 - Dell Information Storage and Management Foundations 2023 Exam

Dell EMC VxBlock is a Converged Infrastructure (CI) solution.

It integrates compute, virtualization, network, and storage into a single engineered solution.

Unlike HCI (Hyper-Converged Infrastructure) solutions, CI solutions do not use software-defined storage as a key component.

References: Dell Information Storage and Management V5 documents

The purpose of the policy engine in a data archiving environment is to automate the process of moving the appropriate data from primary storage into archive storage. It does this by monitoring data access patterns in primary storage and automatically moving the data that is least accessed into an archive storage device. This process allows for more efficient use of primary storage and also reduces storage costs.

In a full mesh topology, increasing the number of FC switches leads to a higher number of inter-switch links (ISLs). These ISLs consume switch ports that would otherwise be available for node connectivity, thereby reducing the total number of ports available for connecting storage and compute nodes.

References:

Dell EMC Information Storage and Management V5, Module: Storage Networking

When deploying a security control mechanism to protect assets, it is crucial to ensure that unauthorized users have limited access. This minimizes the risk of attacks and data breaches by controlling who can access sensitive information and resources. Security controls should be designed to prevent unauthorized access while ensuring that authorized users have the necessary access to perform their duties.

References:

Dell EMC Information Storage and Management V5 course material, Module on Security and Protection.

During a Shared Technology Vulnerability threat, an attacker exploits the weaknesses of tools used to enable multi-tenancy. Multi-tenancy allows multiple customers to share the same applications or physical infrastructure while keeping their data isolated. However, if there are vulnerabilities in the tools that support this shared environment, attackers can exploit these weaknesses to gain unauthorized access to data or disrupt services.

References:

Dell EMC Information Storage and Management (ISM) v5, Security and Risk Management Module, particularly the discussion on multi-tenancy and shared technology vulnerabilities.

Target-based deduplication is a method where the deduplication process occurs at the target storage device. This method is commonly used by cloud service providers because it reduces the amount of data transferred over the network by eliminating redundant data before it is stored. This approach improves storage efficiency and reduces costs.References:= Dell Information Storage and Management V5 course materials

Capacity is a management monitoring parameter that involves examining the amount of infrastructure resources used. This includes monitoring storage capacity, network bandwidth, CPU utilization, memory usage, and other resources. Capacity management is important for ensuring that the infrastructure has sufficient resources to meet the demands of the business or customers. It involves predicting future resource needs, identifying capacity bottlenecks, and optimizing resource utilization to avoid performance degradation or service disruptions. Reference: Section 2.2.2 Infrastructure Resource Monitoring, page 76.

The Mean Time to Repair (MTTR) is calculated by averaging the repair times of the failed component. For Port 4, the failures and repair durations are as follows:

Monday: 8 PM to 11 PM (3 hours)

Wednesday: 7 PM to 10 PM (3 hours)

Thursday: 6 AM to 12 PM (6 hours)

Total downtime = 3 + 3 + 6 = 12 hours Number of failures = 3

MTTR = Total downtime / Number of failures = 12 hours / 3 = 4 hours

References: Dell Information Storage and Management V5 Course Materials, Reliability, Availability, and Serviceability (RAS) Section.

Total Operational Hours (Monday to Friday): 12 hours/day * 5 days = 60 hours

Failure Times:

Monday: 2 hours (10 AM to 12 PM)

Wednesday: 5 hours (4 PM to 9 PM)

Thursday: 3 hours (4 PM to 7 PM)

Friday: 3 hours (3 PM to 6 PM)

Saturday (not counted in the required time frame)

Total Failure Hours (Monday to Friday): 2 + 5 + 3 + 3 = 13 hours

Availability Calculation:Availability=(Total Operational Hours−Failure HoursTotal Operational Hours)×100Availability=(Total Operational HoursTotal Operational Hours−Failure Hours​)×100Availability=(60−1360)×100=70Availability=(6060−13​)×100=70

References: Dell ISM V5 Course, Module on Availability and Performance Management.