CLOUD COMPUTING

CLOUD COMPUTING

DISASTER RECOVERY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following drive configurations uses striping with parity for fault tolerance?
A
RAID 1
B
RAID 0
C
RAID 10
D
RAID 5
Explanation: 

Detailed explanation-1: -Which of the following drive configuration uses striping with parity for fault tolerance? RAID 5 also uses disk striping, but provides fault tolerance for a single disk failure. Disk striping breaks data into units and stores the units across a series of disks by reading and writing to all disks simultaneously.

Detailed explanation-2: -RAID 5. RAID 5 is disk striping with parity. With this level of RAID, data is striped across three or more disks, with parity information stored across multiple disks. Parity is a calculated value that’s used to restore data from the other drives if one of the drives in the set fails.

Detailed explanation-3: -RAID 5 is a redundant array of independent disks configuration that uses disk striping with parity. Because data and parity are striped evenly across all of the disks, no single disk is a bottleneck. Striping also allows users to reconstruct data in case of a disk failure.

Detailed explanation-4: -A RAID 5 configuration can tolerate the failure of one of its physical disks. If more than one disk fails, data is not recoverable. A RAID 5 configuration can tolerate the failure of up to 2 of its physical disks. If more than two disks fail, data is not recoverable.

Detailed explanation-5: -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.

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