RAID 1 configuration
RAID 1 writes all data to two or more drives for 100% redundancy: if either drive fails, no data is lost. Compared to a single drive, RAID level 1 tends to be faster on reads, slower on writes. This is a good entry-level redundant configuration. However, since an entire drive is a duplicate, the cost per megabyte is high. This is commonly referred to as mirroring.
Minimum number of drives required: 2
- Fault tolerant
- Easy to recover data in case of drive failure
- Easy to implement
- Highly inefficient (100% parity overhead)
- Not scalable (becomes very costly as number of disks increase)