DEA-1TT5 Storage Systems Fundamentals 3

Question 1

What distinguishes NVMe from SATA as a storage interface protocol?

Accepted Answer

NVMe uses the PCIe bus with lower latency and higher parallelism than the SATA interface

Answer

NVMe (Non-Volatile Memory Express) leverages the PCIe bus and supports up to 65,535 queues with 65,535 commands each, drastically outperforming SATA's single queue of 32 commands.

Question 2

What is a 'LUN' in SAN storage?

Accepted Answer

Logical Unit Number — a logical identifier assigned to a storage volume presented to a host

Answer

A LUN (Logical Unit Number) is a logical identifier that represents a storage volume or portion of storage presented to a host by a storage array.

Question 3

Which storage term refers to the maximum amount of data that can be transferred per unit of time?

Accepted Answer

Throughput

Answer

Throughput (bandwidth) measures the volume of data transferred over time, typically expressed in MB/s or GB/s, and is critical for sequential workloads like streaming and backups.

Question 4

In a storage array, what is 'multipathing' used for?

Accepted Answer

Providing multiple physical paths between a host and storage to ensure availability and load balancing

Answer

Multipathing software manages multiple physical connections between a host and storage array, providing path failover if one connection fails and enabling load balancing across paths.

Question 5

What is the purpose of 'zoning' in a Fibre Channel SAN?

Accepted Answer

To control which hosts can see and communicate with which storage targets

Answer

Zoning is a Fibre Channel fabric security feature that restricts which initiators (HBAs) can communicate with which targets (storage ports), preventing unauthorized access.

DEA-1TT5 - Information Storage and Management Exam Practice Test

DEA-1TT5 - Information Storage and Management Exam Practice Test

DEA-1TT5 Storage Systems Fundamentals 3