1. What is RAID Redundancy?

RAID (Redundant Array of Independent Disks) redundancy refers to the amount of disk capacity used for fault tolerance in a RAID array. Different RAID levels provide different levels of redundancy to protect against disk failures.

2. How Does the Calculator Work?

The calculator uses the RAID redundancy formula:

Where:

• \( RaidLevel \) — The RAID level (0, 1, 5, 6, etc.)
• \( Disks \) — Number of disks in the array

Explanation: The formula calculates how much disk capacity is used for redundancy based on the RAID level and number of disks.

3. Importance of RAID Redundancy

Details: RAID redundancy is crucial for data protection and system availability. It determines how many disk failures an array can withstand before data loss occurs.

4. Using the Calculator

Tips: Select the RAID level and enter the number of disks in the array. The calculator will show the amount of redundancy provided.

5. Frequently Asked Questions (FAQ)

Q1: What RAID level provides the most redundancy?
A: RAID 6 provides the highest level of redundancy, allowing for two disk failures before data loss.

Q2: Does RAID 0 provide any redundancy?
A: No, RAID 0 provides no redundancy. It stripes data across disks for performance but offers no fault tolerance.

Q3: How much redundancy does RAID 5 provide?
A: RAID 5 provides single-disk redundancy using distributed parity.

Q4: Is more redundancy always better?
A: While more redundancy increases fault tolerance, it also reduces available storage capacity and may impact performance.

Q5: Can I mix different RAID levels?
A: Some systems support nested RAID levels (like RAID 50 or 60) that combine characteristics of different RAID levels.