RAID

Question 1

What does RAID stand for?

Answer 1

Redundant Array of Independent Disks (or Inexpensive Disks)

Question 2

What is the primary purpose of RAID?

Answer 2

To provide redundancy, improve performance, or both by combining multiple physical drives

Question 3

Is RAID a backup solution?

Answer 3

No, RAID provides redundancy but does not replace the need for backups

Question 4

What is RAID 0?

Answer 4

Striping; data is split across multiple drives for improved performance, but no redundancy

Question 5

What is the minimum number of drives required for RAID 0?

Answer 5

2

Question 6

What happens if a drive fails in RAID 0?

Answer 6

All data is lost because there is no redundancy

Question 7

What is RAID 1?

Answer 7

Mirroring; data is duplicated across multiple drives for redundancy

Question 8

What is the minimum number of drives required for RAID 1?

Answer 8

2

Question 9

What happens if a drive fails in RAID 1?

Answer 9

The system continues to operate using the remaining drive(s) with duplicated data

Question 10

What is the storage capacity of RAID 1 with two drives?

Answer 10

Equal to the capacity of one drive (since data is mirrored)

Question 11

What is RAID 5?

Answer 11

Striping with parity; data is striped across multiple drives with parity information for redundancy

Question 12

What is the minimum number of drives required for RAID 5?

Answer 12

3

Question 13

How is parity distributed in RAID 5?

Answer 13

Parity is distributed across all drives in the array

Question 14

What happens if a drive fails in RAID 5?

Answer 14

The system can recreate the lost data using parity and continue to operate in a degraded state

Question 15

What is RAID 6?

Answer 15

Striping with double parity; data is striped across multiple drives with two sets of parity information

Question 16

What is the minimum number of drives required for RAID 6?

Answer 16

4

Question 17

What happens if two drives fail in RAID 6?

Answer 17

The system can recreate the lost data using the double parity and continue to operate in a degraded state

Question 18

What is RAID 10 (or RAID 1+0)?

Answer 18

A stripe of mirrors; combines RAID 1 (mirroring) and RAID 0 (striping) for both redundancy and performance

Question 19

What is the minimum number of drives required for RAID 10?

Answer 19

4

Question 20

How does RAID 10 provide redundancy?

Answer 20

Data is mirrored (RAID 1) and then striped (RAID 0) across multiple sets of mirrored drives

Question 21

What happens if a drive fails in RAID 10?

Answer 21

The system continues to operate using the mirrored copy of the failed drive

Question 22

What is the storage capacity of RAID 10 with four drives?

Answer 22

Equal to half the total capacity (since data is mirrored)

Question 23

What is the performance impact of RAID 5 during drive failure?

Answer 23

Increased CPU overhead due to parity calculations for data recovery

Question 24

What is the advantage of RAID 6 over RAID 5?

Answer 24

RAID 6 can survive the failure of two drives, while RAID 5 can only survive one

Question 25

What is the disadvantage of RAID 6 compared to RAID 5?

Answer 25

RAID 6 requires more drives and has higher overhead due to double parity

Question 26

RAID is a backup solution.

Answer 26

False (RAID provides redundancy, not backup)

Question 27

RAID 0 provides redundancy.

Answer 27

False (RAID 0 provides no redundancy)

Question 28

RAID 1 requires at least 3 drives.

Answer 28

False (RAID 1 requires at least 2 drives)

Question 29

RAID 5 can survive the failure of two drives.

Answer 29

False (RAID 5 can only survive the failure of one drive)

Question 30

RAID 6 can survive the failure of two drives.

Answer 30

True

Question 31

RAID 10 combines RAID 0 and RAID 1.

Answer 31

True

Question 32

RAID 0 improves performance by striping data across drives.

Answer 32

True

Question 33

RAID 1 doubles the storage capacity of the drives used.

Answer 33

False (RAID 1 mirrors data, so capacity equals the size of one drive)

Question 34

RAID 5 distributes parity across all drives.

Answer 34

True

Question 35

RAID 6 uses a single parity drive.

Answer 35

False (RAID 6 uses double parity)

Question 36

RAID 10 requires at least 4 drives.

Answer 36

True

Question 37

RAID 5 has no performance impact during normal operation.

Answer 37

False (RAID 5 has some overhead due to parity calculations)

Question 38

RAID 6 is slower than RAID 5 due to double parity.

Answer 38

True

Question 39

RAID 0 is suitable for critical data storage.

Answer 39

False (RAID 0 has no redundancy and is not suitable for critical data)

Question 40

RAID 1 is suitable for critical data storage.

Answer 40

True

Question 41

RAID 10 provides both performance and redundancy.

Answer 41

True

Question 42

A user wants to improve read/write performance without redundancy. What RAID level should they use?

Answer 42

RAID 0

Question 43

A system administrator needs redundancy for critical data. What RAID level should they use?

Answer 43

RAID 1 or RAID 10

Question 44

A technician is setting up a file server with four drives and needs redundancy and performance. What RAID level should they use?

Answer 44

RAID 10

Question 45

A user wants to maximize storage capacity with redundancy. What RAID level should they use?

Answer 45

RAID 5 or RAID 6

Question 46

A server has three drives and needs redundancy. What RAID level should they use?

Answer 46

RAID 5

Question 47

A technician is configuring a storage array that must survive two drive failures. What RAID level should they use?

Answer 47

RAID 6

Question 48

A user wants to mirror data across two drives. What RAID level should they use?

Answer 48

RAID 1

Question 49

A system administrator is setting up a database server with six drives and needs both performance and redundancy. What RAID level should they use?

Answer 49

RAID 10

Question 50

A technician is troubleshooting a RAID 5 array with a failed drive. What should they do to restore redundancy?

Answer 50

Replace the failed drive and allow the RAID to rebuild

Question 51

A user wants to stripe data across three drives for performance. What RAID level should they use?

Answer 51

RAID 0

Question 52

A system administrator needs to ensure data availability even if two drives fail. What RAID level should they use?

Answer 52

RAID 6

Question 53

A technician is setting up a RAID array with two drives and needs redundancy. What RAID level should they use?

Answer 53

RAID 1

Question 54

A user wants to combine the speed of RAID 0 with the redundancy of RAID 1. What RAID level should they use?

Answer 54

RAID 10

Question 55

A system administrator is configuring a RAID array with five drives and needs redundancy. What RAID level should they use?

Answer 55

RAID 5 or RAID 6

Question 56

A technician is replacing a failed drive in a RAID 1 array. What happens to the data during the replacement?

Answer 56

The data remains available on the remaining drive

Question 57

A user wants to create a RAID array with minimal drives for redundancy. What RAID level should they use?

Answer 57

RAID 1