Disadvantages of RAID 1
- In RAID 1 , the write operation is slower as compared to the read operation.
- Here, there is a wastage of storage space as we keep the same data in two different disks.
- The cost incurred in RAID 1 is high.
Therefore, RAID 1 can be used mostly in cases where fault tolerance, data redundancy and high availability is required by the applications.
Disk Mirroring (RAID 1)
RAID 1 stands for Redundant Array of Independent Disks 1. RAID 1, also known as disk mirroring, is the technique of storing a copy of the same data in another disk. Here, the data is not broken into blocks rather a duplicate copy of the data is stored in another disk. A minimum of 2 disks are required in RAID.
Supposing, we have some data namely, D1, D2, and D3. In RAID 1, along with these original data we store copies of these data in another disk. Below is a diagram justifying the above statement and thus explaining the concept of RAID 1.
RAID 1