Raid 1 0 Calculator
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Reviewed by Calculator Editorial Team
RAID 1 0 is a storage configuration that combines mirroring (RAID 1) and striping (RAID 0) to provide both data redundancy and improved performance. This calculator helps you determine the effective storage capacity and redundancy benefits of RAID 1 0 configurations.
What is RAID 1 0?
RAID 1 0 is a nested RAID configuration that combines the benefits of RAID 1 (mirroring) and RAID 0 (striping). In RAID 1 0, data is first mirrored across multiple disks (RAID 1) and then striped across those mirrored pairs (RAID 0).
Key Characteristics:
- Provides both data redundancy and performance benefits
- Requires at least 4 disks (minimum 2 mirrored pairs)
- Offers good read performance but write performance is limited by the slowest disk
- Can survive the failure of one disk in each mirrored pair
The RAID 1 0 configuration is often used in storage systems where both data protection and performance are important. It's particularly useful in applications that require high read performance and can tolerate some performance degradation during writes.
How to Calculate RAID 1 0
Calculating RAID 1 0 storage involves understanding how the data is distributed across the disks. Here's the basic formula:
Total Capacity = (Number of Disks / 2) × Disk Size × (1 - Parity Overhead)
Where:
- Number of Disks must be even (minimum 4)
- Parity Overhead is typically 0% for RAID 1 0 (no parity is used)
The calculation assumes you're using all available disks in the array. The effective capacity is reduced because some space is used for mirroring rather than for actual data storage.
Step-by-Step Calculation
- Count the number of disks in your RAID 1 0 array (must be even)
- Divide the number of disks by 2 to get the number of mirrored pairs
- Multiply the number of pairs by the disk size to get the total capacity
- Subtract any parity overhead (typically 0% for RAID 1 0)
For example, with 4 disks each of 1TB capacity, the calculation would be:
(4 / 2) × 1TB × (1 - 0%) = 2 × 1TB = 2TB
Example Calculation
Let's walk through an example to illustrate how RAID 1 0 storage is calculated.
Scenario
- Number of disks: 8
- Disk size: 2TB each
- Parity overhead: 0%
Calculation Steps
- Number of mirrored pairs = 8 / 2 = 4 pairs
- Total capacity = 4 × 2TB × (1 - 0%) = 8TB
Result: The RAID 1 0 array will have a total capacity of 8TB.
This means you'll have 8TB of usable storage space, with all data mirrored across two disks for redundancy.
FAQ
How many disks are needed for RAID 1 0?
RAID 1 0 requires at least 4 disks (minimum 2 mirrored pairs). The number of disks must be even.
What is the difference between RAID 1 0 and RAID 10?
RAID 1 0 and RAID 10 are essentially the same configuration. The notation differs only in the order of the numbers (1 0 vs 10). Both represent a nested RAID configuration combining mirroring and striping.
Can I add more disks to an existing RAID 1 0 array?
Adding disks to an existing RAID 1 0 array is possible, but it typically requires recreating the array. The new configuration would need to maintain the mirrored pairs structure.
What happens if one disk fails in a RAID 1 0 array?
If one disk fails in a mirrored pair, the data is still available from the other disk in the pair. The array can continue to function normally until the failed disk is replaced.