Miscellaneous CalculatorsFree Tool

RAID Calculator

Provided byOmni Calculatoromnicalculator.com

This RAID calculator will help you decide which configuration of disks (RAID level) is right for you, based on usable...

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About this tool

What RAID Calculator does

A RAID Calculator designed to help users choose the optimal disk array configuration. It accepts inputs such as disk size, number of disks, and desired RAID level, then outputs usable capacity, unavailable capacity, capacity utilization, read and write speed gains, fault tolerance details, and cost metrics including cost per usable TB and total disk cost. The tool is structured to compare the most commonly used RAID levels side by side, allowing users to evaluate trade-offs between performance, redundancy, and expense before committing to a physical setup.

Step by step

How to use the Omni Calculator RAID Calculator

  1. 1

    Select the desired RAID level from the dropdown menu

  2. 2

    Enter the size of a single disk in terabytes or gigabytes

  3. 3

    Input the number of disks you plan to use in the array

  4. 4

    Review the calculated outputs for usable capacity, speed gains, fault tolerance, and cost metrics

  5. 5

    Use the share or clear functions to export results or start a new calculation

Is it right for you

Best for

This option suits builders and IT planners who need to compare RAID levels based on capacity, performance, and cost before purchasing or configuring hardware.

Limitations

  • Results are estimates based on idealized RAID assumptions
  • Does not account for real-world variables such as controller overhead or specific drive models
  • No unit switching between imperial and metric storage measurements
Questions

RAID Calculator FAQ

What RAID level offers the best performance without redundancy?
RAID 0 stripes data across all disks, delivering the highest read and write speeds, but provides no fault tolerance; a single disk failure results in complete data loss.
How does RAID 5 balance capacity and redundancy?
RAID 5 uses block-level striping with distributed parity, requiring a minimum of three disks; one disk's worth of capacity is reserved for parity, allowing the array to survive a single disk failure.
Can this calculator show the cost impact of choosing a mirrored setup?
Yes, the tool outputs total disk cost and cost per usable TB, allowing users to compare the expense of mirrored levels like RAID 1 or RAID 10 against striped or parity-based configurations.
What does fault tolerance mean in the context of these RAID levels?
Fault tolerance refers to the array's ability to remain operational and retain data after one or more disk failures, depending on the RAID level's redundancy method.
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