RAID 3.3

Question 1

What does RAID stand for?

Answer 1

Redundant Array of Independent Disks

Question 2

What is RAID?

Answer 2

RAID combines multiple disks into one system to improve performance, redundancy, or both

Question 3

What is RAID 0?

Answer 3

Spreads (stripes) data across both drives
RAID 0 is great for speed but provides no data redundancy
RAID 0 has no loss of space on the disks

Question 4

What is RAID 1?

Answer 4

Unlike 0 it has Redundancy, which means it duplicates/mirrors data across both drives. This makes it so that if one disk is destroyed is’t stilled mirrored on the other.
This costs extra storage on the device and doesn’t have the speed of raid 0

Question 5

What is RAID 10?

Answer 5

Like RAID 1+0. Mirrors the data among two pairs of disks(like RAID 1) then stripes the data two those pairs

Question 6

What is RAID 5?

Answer 6

Redundancy through Parity. Requires at least 3 drives. Able to cover the loss memory of a drive through calculating the result of loss that was striped in the other drives
Example: (drive 1 destroyed) + 2=5. if we know D2 is 2 and D3 is 5, then we know the Lost data of D1=3

Question 7

What is RAID 6?

Answer 7

One better than RAID 5, has double parity so it can handle 2 drive losses instead of 1

Question 8

Q: What RAID level provides redundancy through mirroring?

Answer 8

A: RAID 1

Question 9

Q: “Best RAID for speed only”

Answer 9

A: RAID 0

Question 10

Q: “Best RAID for speed and redundancy”

Answer 10

A: RAID 10

Question 11

Q: What happens if two drives fail in RAID 5?

Answer 11

A: Data is lost

Question 12

Q: What happens if one drive fails in RAID 5?

Answer 12

A: Data is rebuilt using parity

Question 13

Q: What RAID level can survive multiple drive failures (one per mirror)?

Answer 13

A: RAID 10