Raid Size Calculator


The RAID Size Calculator is a valuable tool for IT professionals and enthusiasts involved in data storage configurations. It calculates the total RAID size, taking into account the capacity of individual disks and the number of disks in the RAID array. This information is crucial for planning storage solutions that balance performance, redundancy, and capacity.


The calculator uses a simple formula to determine the total RAID size. It multiplies the capacity of each disk by the number of disks in the RAID array. This provides a straightforward measure of the combined storage available in the RAID configuration.

How to Use

  1. Enter the capacity of each disk in terabytes.
  2. Input the number of disks in the RAID array.
  3. Click the “Calculate” button.
  4. View the total RAID size in terabytes in the result.


For example, if you have individual disks with a capacity of 2 terabytes each and you plan to use 4 disks in the RAID array, input these values, click “Calculate,” and the calculator will provide the total RAID size in terabytes.


Q1: What is RAID, and why is it used? A1: RAID (Redundant Array of Independent Disks) is a storage technology that combines multiple disk drives into a single logical unit to improve performance, redundancy, or a combination of both.

Q2: How does RAID improve data storage performance? A2: RAID can improve performance by striping data across multiple disks, allowing parallel read and write operations.

Q3: What RAID levels does the calculator support? A3: The calculator provides a general calculation applicable to various RAID levels. It is not specific to any particular RAID level.

Q4: Does RAID provide data redundancy? A4: Yes, certain RAID levels (e.g., RAID 1, RAID 5) provide data redundancy by mirroring or parity protection.

Q5: How should I choose the number of disks for my RAID array? A5: The number of disks depends on your storage requirements, performance goals, and desired level of redundancy. Consider consulting with IT professionals for guidance.

Q6: Can I use disks of different capacities in a RAID array? A6: RAID arrays typically work best with disks of the same capacity. Mixing capacities may result in reduced overall capacity or inefficient use of disk space.

Q7: Is RAID suitable for all types of data storage? A7: RAID is suitable for various data storage scenarios, including servers, workstations, and network-attached storage (NAS).

Q8: What happens if a disk fails in a RAID array? A8: The RAID array remains operational if redundancy is built in (e.g., RAID 1, RAID 5). In case of a disk failure, data can be rebuilt from the remaining disks.

Q9: Can I expand the RAID array later by adding more disks? A9: Depending on the RAID level and controller, some configurations allow for expansion by adding more disks.

Q10: Are there RAID configurations suitable for high-performance applications? A10: RAID 0 (striping) can offer high performance but without redundancy. RAID 10 combines striping and mirroring for both performance and redundancy.


The RAID Size Calculator simplifies the planning process for data storage configurations by providing a quick estimate of the total RAID size based on disk capacity and quantity. This information is crucial for making informed decisions about the storage infrastructure, ensuring that it meets the performance and redundancy requirements of your specific use case. Optimize your data storage with the RAID Size Calculator to achieve an efficient and reliable storage solution.

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