Which of the following RAID types employs two identically sized disks and creates a mirror for data redundancy purposes?

The correct answer is B. RAID 1. RAID 1 is disk mirroring - it writes identical data simultaneously to two drives of the same size, so if one drive fails, the other contains a complete, usable copy. It provides redundancy at the cost of usable capacity (you only get the space of one drive). RAID 0 is striping…

Hardware

Question

Which of the following RAID types employs two identically sized disks and creates a mirror for data redundancy purposes?

Options

ARAID 0
BRAID 1
CRAID 1+0
DRAID 5

How the community answered

(46 responses)

A
2% (1)
B
91% (42)
C
2% (1)
D
4% (2)

Explanation

RAID 1 is disk mirroring - it writes identical data simultaneously to two drives of the same size, so if one drive fails, the other contains a complete, usable copy. It provides redundancy at the cost of usable capacity (you only get the space of one drive). RAID 0 is striping with no redundancy - it splits data across two drives for performance but any single drive failure means total data loss. RAID 1+0 (RAID 10) combines mirroring and striping and requires at least four drives. RAID 5 uses distributed parity across three or more drives for redundancy without full mirroring.

Topics

#RAID 1#disk mirroring#data redundancy#RAID types

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