RAID Levels

Question 0

RAID level 0

Answer 0

Striping with no redundancy features. Used to extend disk life and to improve performance.

Question 1

RAID

Answer 1

Technique for adding redundancy, lengthening disk life, improving performance, and enabling relatively uninterrupted access to data.

Question 2

Striping

Answer 2

Spreading data equally over two or more drives

Question 3

RAID level 1

Answer 3

Disk mirroring. Data is duplicated onto multiple drives, typically two disks. In event of failure, data can be read from the secondary disk.

Question 4

Disk duplexing

Answer 4

Similar to mirroring, but each disk is managed by a separate adapter

Question 5

RAID level 5

Answer 5

Block level striping with distributed parity. Data I striped block by block across the disks in the array.

Question 6

RAID 0+1 (or RAID 01)

Answer 6

A mirrored set of striped disks. At minimum, this arrangement requires four drives.

Question 7

RAID 1+0 (or RAID 10)

Answer 7

A striped set of mirrored disks.

Question 8

Disk duplexing

Answer 8

Similar to disk mirroring, but each disk is managed by a separate adapter.