Which of the following storage media would be used to build a RAID 5 array?
A.
Dual layer DVDs
B.
SATA HDDs
C.
Flash drives
D.
Blu-ray discs
Explanation:
http://serverfault.com/questions/192995/raid-5-with-big-sata-disks-do-or-dont
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RAID 5 consists of block-level striping with distributed parity. Unlike in RAID 4, parity information is distributed among the drives. It requires that all drives but one be present to operate. Upon failure of a single drive, subsequent reads can be calculated from the distributed parity such that no data is lost. RAID 5 requires at least three disks.
In comparison to RAID 4, RAID 5’s distributed parity evens out the stress of a dedicated parity disk among all RAID members. Additionally, read performance is increased since all RAID members participate in serving of the read requests.
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