CLOUD COMPUTING

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CLOUD COMPUTING

DISASTER RECOVERY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When implementing ____, a mirrored volume stores data to two duplicate disks simultaneously. If one disk fails, data is present on the other disk, and the system switches immediately from the failed disk to the functioning disk. Mirroring provides fault tolerance for a single disk failure, but does not increase performance.
A
RAID 1
B
RAID 0
C
RAID 5
D
RAID 10
Explanation: 

Detailed explanation-1: -If there are an even number of hard disk drives, disk striping can be combined with disk mirroring to speed up performance and expand capacity by striping data across multiple sets of mirrored drives. This combination is also called RAID 10, or RAID 1+0.

Detailed explanation-2: -Unlike RAID 0, RAID 1 provides data redundancy, creating a fault-tolerant array. So, in a two-disk RAID 1 configuration, if one disk drive fails, the second disk drive contains the same data, ergo, data was not lost and can be easily recovered.

Detailed explanation-3: -RAID 10 uses logical mirroring to write the same data on two or more drives to provide redundancy. If one disk fails, there is a mirrored image of the data stored on another disk. Additionally, the array uses block-level striping to distribute chunks of data across different drives.

Detailed explanation-4: -RAID 10 utilizes logical mirroring to duplicate data across two or more disks for redundancy. If one disk fails, the data is replicated and saved on another drive. In addition, the array utilizes block-level striping to disperse data blocks across multiple disks.

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