Pass the DELL EMC DCA-ISM D-ISM-FN-23 Questions and answers with ExamsMirror

In a RAID 1 array, data is mirrored across two disks. So when a host sends one write I/O to the array, the array will perform two write I/Os to store the data on both disks. The other options are incorrect because they do not accurately reflect the number of write I/Os required in a RAID 1 array.

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.

A Denial of Service (DoS) attack is an attempt to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to the Internet. DoS attacks typically flood a network with excessive requests, overwhelming the network and preventing legitimate users from accessing IT resources or services. This type of attack does not compromise user accounts, hijack privileges, or duplicate user credentials, but it does effectively deny service to legitimate users.

References:

Dell EMC Information Storage and Management V5 documentation.

Dell Certification Overview

Asynchronous remote replication is used when data centers are separated by large distances. This method does not impact application response time as much as synchronous replication because the write operations are completed on the source storage systembefore being sent to the remote site. This helps in minimizing the performance impact over long distances like 1600 km.

References:

Dell EMC Information Storage and Management V5 documentation.

Dell Certification Overview

The correct sequence of steps to perform a data recovery operation is as follows:

Backup client requests backup server for datastore services.

Backup server instructs storage node to load backup media in the backup device.

Backup server scans backup catalog to identify the client and data to be restored.

Data is read and sent to the backup client.This sequence ensures that the appropriate data is identified and restored efficiently.References:

Dell EMC Information Storage and Management V5, Module on Data Backup and Recovery

Storage Class Memory (SCM) is a type of non-volatile memory that offers performance characteristics between DRAM and traditional NAND flash. It provides faster read and write speeds compared to flash storage, but it is slower than DRAM.

References: Dell EMC ISM V5 Module 2, "Storage Class Memory," describes the performance characteristics and use cases of SCM.

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.

In storage systems, "block-based" storage refers to the storage of data in fixed-sized blocks. Each block is identified by a unique address and can be individually accessed and modified. Block storage is typically used in SAN (Storage Area Network) environments and is well-suited for databases and virtual machine file systems where high performance and low latency are critical. The "X" in the exhibit likely indicates a storage type that offers these characteristics, pointing towards block-based storage.References: Dell Information Storage and Management V5, Types of Storage Systems,Dell Certification Resource