In a redundant array of inexpensive disks (RAID) systems, data and parity information are striped over several different disks. What is parity information used for?

A.
Information used to create new data

B.
Information used to erase data

C.
Information used to rebuild data

D.
Information used to build data

Explanation:
C: Redundant array of inexpensive disks (RAID) provides fault tolerance for hard drives and the data they hold and can improve system performance.
Redundancy and speed are provided by breaking up the data and writing it across several disks so that different disk heads can work simultaneously to retrieve
the requested information. Control data is also spread across each diskthis is called parityso that if one disk fails, the other disks can work together and
restore its data. If fault tolerance is one of the services a RAID level provides, parity is involved.
+ A is incorrect because parity information is not used to create new data but is used as instructions on how to re-create data that has been lost or corrupted. 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 parity information is not used to erase data but is used as instructions on how to re-create data that has been lost or corrupted.
+ D is incorrect because parity information is not used to build data but is used as instructions on how to re-create data that has been lost or corrupted.