Advantages of RAID 5 Over RAID 1
What is an advantage of RAID 5 over RAID 1?
Which of the following statements describes an advantage of RAID 5 over RAID 1?
a. RAID 5 provides redundancy; RAID 1 does not.
b. RAID 5 provides redundancy for the disk controller.
c. RAID 5 continues to operate with a failure in two disks; RAID 1 can only operate with a failure of one disk.
d. RAID 5 improves performance over RAID 1.
The advantage of RAID 5 over RAID 1
The advantage of RAID 5 over RAID 1 is that RAID 5 provides redundancy for data while also offering better disk utilization and capacity than RAID 1.
In RAID 1, also known as mirroring, data is duplicated onto two separate disks to provide redundancy in case one disk fails. However, this redundancy comes at a cost, as it requires using two disks to store the same amount of data, effectively cutting the disk capacity in half.
In contrast, RAID 5 uses a distributed parity scheme to provide redundancy for data while using only one disk's worth of capacity for parity. This allows RAID 5 to provide better disk utilization and capacity than RAID 1, while still offering the same level of data redundancy.
Furthermore, RAID 5 can continue to operate with a single disk failure, allowing for continued data access and recovery even in the event of a disk failure. In contrast, RAID 1 can only operate with a single disk failure, as it requires both disks to be operational in order to function properly.
Overall, RAID 5 is a good choice for applications that require both data redundancy and efficient use of disk capacity, while RAID 1 is a good choice for applications that require maximum data redundancy and are willing to sacrifice disk capacity to achieve it.