Data Redundancy / Disk Redundancy

Question 1

What is Multipath I/O?

Answer 1

It’s a way to configure multiple pathways in a network for redundancy in case one of the switches or devices fails.

Question 2

Raid 0

Answer 2

Minimum Drives: 2

Striping: Yes
Mirroring: No
Parity Data: No

Increased Performance

Question 3

RAID 1

Answer 3

Minimum Drives: 2

Striping: No
Mirroring: Yes
Parity Data: Yes

Redundancy, Mirroring

Redundancy by mirroring the data identically on two hard disks

Question 4

RAID 5

Answer 4

Minimum Disks: 3

Striping: Yes
Mirroring: No
Parity Data: Yes

Provides redundancy by striping data and parity

Question 5

RAID 6

Answer 5

Minimum Drives: 4

Striping: Yes
Mirroring: No
Parity Data: Yes

Double Parity

Question 6

RAID 10

Answer 6

Minimum Drives: 4

Striping: Yes
Mirroring: Yes
Parity Data: No

Combination of Raid 1 & 0

Question 7

What are the three categories for RAIDS?

Answer 7

Fault-Resistant
Fault-Tolerant
Disaster-Tolerant

Question 8

Which category of RAID protects against loss of data if a single disk fails? (RAID 1 or RAID 5)

Answer 8

Fault-resistant RAID

Question 9

Which category of RAID protects against loss of data if a single component fails? (RAID 1, RAID 5, RAID 6)

Answer 9

Fault-tolerant RAID

Question 10

Which category of RAID provides two independent zones with full access to data? (RAID 10)

Answer 10

Disaster-tolerant RAID