3.3 - RAID

Question 1

What is RAID?

Answer 1

RAID stands for Redundant Array of Independent Disks, a method for using multiple drives to maintain data redundancy and uptime.

Question 2

Is RAID a method of backup?

Answer 2

No, RAID is not a backup method; it’s a way to maintain uptime and availability if a drive fails.

Question 3

What does RAID 0 do?

Answer 3

RAID 0 uses striping to split data across multiple drives for performance, but it offers no redundancy.

Question 4

What happens if a drive fails in RAID 0?

Answer 4

All data is lost because there is no redundancy in RAID 0.

Question 5

What does RAID 1 do?

Answer 5

RAID 1 mirrors data between two drives, providing redundancy in case one drive fails.

Question 6

What is the trade-off in RAID 1?

Answer 6

RAID 1 uses twice as much storage space since data is duplicated between drives.

Question 7

What is RAID 5?

Answer 7

RAID 5 stripes data across drives and uses one additional drive for parity, allowing data to be rebuilt if one drive fails.

Question 8

How does RAID 5 handle a failed drive?

Answer 8

RAID 5 uses parity information to rebuild data in real time when a drive fails.

Question 9

What is RAID 10?

Answer 9

RAID 10 combines RAID 1 and RAID 0, striping data across drives and mirroring the stripes for redundancy.

Question 10

How many drives can fail in RAID 10 without data loss?

Answer 10

RAID 10 can handle multiple drive failures as long as they aren’t from the same mirrored pair.