CST CST Storage & Retention Management 2

Question 1

What does RAID stand for in the context of NVR storage?

Accepted Answer

Redundant Array of Independent Disks

Answer

RAID (Redundant Array of Independent Disks) combines multiple drives to provide data redundancy, performance, or both.

Question 2

Which RAID level provides mirroring, meaning data is written identically to two drives simultaneously?

Accepted Answer

RAID 1

Answer

RAID 1 mirrors data across two drives so that if one fails, the other contains an identical copy ensuring no data loss.

Question 3

What is the key disadvantage of RAID 0 for surveillance storage?

Accepted Answer

It provides no redundancy — a single drive failure causes total data loss

Answer

RAID 0 stripes data across drives for performance but has zero fault tolerance — one drive failure loses all data.

Question 4

RAID 5 requires a minimum of how many drives?

Accepted Answer

3

Answer

RAID 5 requires at least 3 drives to distribute parity data across all drives while maintaining read/write performance.

Question 5

What is a hot spare drive in a RAID array used for surveillance?

Accepted Answer

An extra drive kept powered and ready to automatically replace a failed drive

Answer

A hot spare is an idle drive in the array that automatically begins rebuilding data when another drive fails, minimizing downtime.

(CST) Certified Surveillance Technician Practice Test