RAID Concept
This page will be kept updated.
- Shorts for Redundant Array of Independent Disk
- It is the fail-safe mechanism to handle failure of hard disk.
RAID 0
- No redundancy.
- If one hard drive fails, then we lose info
RAID1
- One redundancy.
- It is fault tolerant.
RAID 5
- Requires at least 3 hard drives.
- Parity data is saved, so 1 hard drive failure is fine.
- Parity data is created by the XOR operator.
- 1010 XOR 1010 –> 0000
RAID6
- Requires at least 4 hard drives.
- Can handle 2 disk failures.
RAID10
- Combination of RAID1 and RAID0.
