EMC Updated D-ISM-FN-23 Exam Questions and Answers by fox

Erasure coding is a method of data protection in which data is divided into data and coding segments. In this case, the configuration has 12 data segments and 5 coding segments, allowing it to tolerate up to 5 simultaneous disk failures. The coding segments provide redundancy, enabling the reconstruction of data even if up to 5 disks fail.

References:

• Dell EMC Education Services

Data shredding is a method of data destruction that goes beyond simple deletion. It involves overwriting the data on a storage device multiple times with random data to ensure that the original data cannot be recovered. This process is used to securely erase sensitive information and protect against data breaches and unauthorized access.References: Dell Information Storage and Management V5 documents, ExamTopics.

The exhibit shows the architecture of a NAS (Network Attached Storage) system that processes file I/O operations. Both scale-up and integrated NAS systems can process file write and read operations as described. Scale-up NAS systems add storage capacity by adding more storage to existing nodes, while integrated NAS systems combine the NAS head and storage into a single unit.

References:

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

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.