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Which of the following activities divides and writes data over several drives?

RAID systems use a number of techniques to provide redundancy and performance. Which of the following activities divides and writes data over several drives?

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A.
Parity

B.
Mirroring

C.
Striping

D.
Hot-swapping

Explanation:
C: Redundant array of inexpensive disks (RAID) is a technology used for redundancy and/or performance improvement. It combines several physical disks and
aggregates them into logical arrays. When data is saved, the information is written across all drives. A RAID appears as a single drive to applications and other
devices. When striping is used, data is written across all drives. This activity divides and writes the data over several drives. Both write and read performance are
increased dramatically because more than one head is reading or writing data at the same time.
+ A is incorrect because parity is used to rebuild lost or corrupted data. Various levels of RAID dictate the type of activity that will take place within the RAID
system. Some levels deal only with performance issues, while other levels deal with performance and fault tolerance. If fault tolerance is one of the services a
RAID level provides, parity is involved. If a drive fails, the parity is basically instructions that tell the RAID system how to rebuild the lost data on the new hard drive.
Parity is used to rebuild a new drive so that all the information is restored.
+ B is incorrect because mirroring occurs when data is written to two drives at once. If one drive fails, the other drive has the exact same data available. Mirroring
provides redundancy. Mirroring occurs at Level 1 of RAID systems, and with striping in Level 10.
+ D is incorrect because hot-swappable refers to a type of disk that is in most RAID systems. RAID systems with hot-swapping disks are able to replace drives
while the system is running. When a drive is swapped out, or added, the parity data is used to rebuild the data on the new disk that was just added.

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