D-ISM-FN-23 Exam Dumps - EMC DCA-ISM Questions and Answers

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

• Deduplication is a process used to eliminate duplicate copies of repeating data.
• The exhibit shows a reduction in the number of shapes, indicating that duplicate data has been removed.
• Replication, archiving, and migration do not specifically involve the elimination of duplicates but rather involve copying, storing, or moving data.

References: Dell Information Storage and Management V5 documents

RAID 6 uses two parity blocks for data protection, allowing it to withstand the failure of two drives. In a RAID 6 array with four 250 GB disks, the usable capacity is calculated by subtracting the space used for parity. With four disks, two are used for parity, leaving the capacity of two disks for data storage. Therefore, the total usable data storage capacity is 2 * 250 GB = 500 GB.

References:

• Dell EMC Information Storage and Management V5 documentation.
• Dell Certification Overview

Parity-based RAID protection uses fewer physical drives than mirroring to provide the same level of data protection. It does this by using error correction codes to detect and correct errors in the data. This allows for a much more efficient use of storage capacity, as it only requires the same amount of storage capacity as the actual data, rather than requiring twice the storage capacity as with mirroring. Additionally, parity RAID systems have the advantage of being able to recover from drive failures without having to wait for the data to be rewritten to the remaining drives, as is the case with mirroring.

Continuous Data Protection (CDP) is a data protection method that continuously captures or tracks data modifications and stores changes independently of the primary data. A CDP appliance works by intercepting all writes to the production volume. It splits each write operation into two copies: one copy is written to the production volume, and the other is sent to a separate storage location where the changes are logged. This enables recovery to any point in time and helps ensure data integrity.

References:

• Dell Information Storage and Management V5 course materials, section on CDP
• Dell EMC documentation on Continuous Data Protection

Data backup is the process of copying data to a secondary location to protect it from accidental deletion, application crashes, data corruption, and disasters. Regular backups ensure that data can be restored to a previous state in case of any data loss events.

References:

• Dell EMC Information Storage and Management V5, Module: Data Protection

The image illustrates a typical network connectivity setup where clients are connected to servers via an Ethernet switch, and the servers are connected to storage systems through an iSCSI target and an FC switch. This setup is representative of compute to storage connectivity, where the servers (compute) access storage resources.

References:

• Dell EMC Information Storage and Management V5 course material, Module on Networked Storage - SAN.

The Cisco MDS-9132T switch model supports NVMe over Fibre Channel (FC) in a 32Gb/s SAN fabric. NVMe (Non-Volatile Memory Express) is a protocol designed for SSDs to exploit the performance potential of flash technology and provides faster data access compared to traditional SCSI protocols. The MDS-9132T is optimized for modern data centers requiring high-performance storage connectivity.

References:

• Dell EMC Information Storage and Management V5 course material, Module on Fibre Channel SAN.
• Cisco MDS 9000 Series Multilayer Switches data sheet.

The "variability" characteristic of big data refers to the changing and often unpredictable nature of the data and its context. Variability highlights the need for systems to adapt and understand the context in which the data is used to extract meaningful information. This is crucial for making accurate and timely decisions based on data that can vary greatly in form and meaning depending on the situation.References: Dell Information Storage and Management V5, Big Data Characteristics,Dell Certification Resource

In Fibre Channel (FC) zoning, there are different types of zones that can be implemented:

• Port zoning: Zones are created based on the physical ports on the FC switch.
• WWN zoning: Zones are created based on the World Wide Names (WWNs) of the devices.
• Mixed zoning: Zones can be created using a combination of both port numbers and WWNs.

Referring to the provided exhibit:

• Zone1: Mixed (since it includes both port and WWN)
• Zone2: WWN (since it only uses WWN for zoning)
• Zone3: Port (since it uses ports for zoning)

References:

• Dell EMC Information Storage and Management V5 documentation.
• Dell Certification Overview