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Exam 220-1101 topic 1 question 161 discussion

Actual exam question from CompTIA's 220-1101

Question #: 161
Topic #: 1

A drive failed on a server that was leveraging a RAID disk configuration. The server administrator would like to rebuild the array so it can withstand a potential multidrive failure in the future. Which of the following RAID configurations will the administrator MOST likely select?

A. 0
B. 1
C. 5
D. 10

Show Suggested Answer

Suggested Answer: D 🗳️

by fiela1 at Nov. 28, 2022, 12:58 p.m.

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fiela1

Highly Voted 2 years, 8 months ago

The answer is RAID 10 but it's not a good question because the RAID 10 can only handle multiple drive failures if they're on different mirrored pairs.

upvoted 8 times

Ucloud

2 years, 5 months ago

It is generally implied that they would be on different mirrored pairs.

upvoted 2 times

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a792193

Highly Voted 1 year, 11 months ago

RAID 10 can tolerate multidrive failures

upvoted 5 times

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vduffy75

Most Recent 5 months ago

Selected Answer: D

Keyword is Multidrive. Answer is Raid 10

upvoted 1 times

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JonHin

5 months, 1 week ago

D RAID stands for Redundant Array of Independent Disks, which is a technology that combines multiple disks into a logical unit to improve performance, reliability, or both. There are different types of RAID levels that use different methods of data distribution and redundancy. RAID 0 is a level that stripes data across multiple disks without any redundancy. It offers the highest performance but no fault tolerance. If any disk fails, the entire array is lost. RAID 1 is a level that mirrors data across two disks. It offers the lowest performance but the highest fault tolerance. It can survive the failure of one disk

upvoted 1 times

JonHin

5 months, 1 week ago

RAID 5 is a level that stripes data across multiple disks with parity information. It offers a balance between performance and fault tolerance. It can survive the failure of one disk, but not two or more disks. RAID 10 is a level that combines RAID 1 and RAID 0. It creates a striped array of mirrored pairs. It offers high performance and high fault tolerance. It can survive the failure of one disk in each pair, or multiple disks in different pairs. Therefore, if the server administrator wants to rebuild the array to withstand a potential multidrive failure in the future, RAID 10 is the most likely choice.

upvoted 1 times

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Nate_A

8 months, 2 weeks ago

The administrator should select D. RAID 10. RAID 10, also known as RAID 1+0, combines the features of RAID 0 and RAID 1. It provides both data striping for performance and mirroring for redundancy. This configuration allows the server to withstand multiple drive failures, making it a highly reliable solution for critical systems. Here's a breakdown of why other options are not suitable: RAID 0: Provides performance but no redundancy, making it vulnerable to single drive failures. RAID 1: Provides redundancy but no performance benefits, as data is mirrored across multiple drives. RAID 5: Provides a balance between performance and redundancy, but it's more susceptible to data loss if multiple drives fail during a rebuild. Therefore, RAID 10 is the optimal choice for the administrator who wants to ensure high availability and fault tolerance for the server. GG

upvoted 3 times

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StudioKira

1 year, 6 months ago

Selected Answer: D

Raid 5 can only survive 1 fail but 10 can survive multiple

upvoted 3 times

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rah555

2 years ago

Selected Answer: C

RAID 5 is a suitable choice for this scenario. It uses block-level striping with distributed parity across multiple drives. By distributing parity information across all drives in the array, RAID 5 provides fault tolerance and can withstand the failure of a single drive without data loss. When a drive fails, the array can be rebuilt by using the parity information and the data from the remaining drives.

upvoted 1 times

alittlesmarternow

1 year, 9 months ago

You explained why you are wrong in your own explanation of why you picked the wrong answer. It said it wants to handle multiple drive failure, not a single drive.

upvoted 5 times

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