6.3 KiB
Advanced RAID Calculator
A professional storage capacity planning tool for various RAID configurations, including standard RAID, Synology SHR, ZFS, and Unraid. Built by Beyond Cloud Technology..
🌟 Features
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Wide RAID Support - Calculates usable storage for:
- Standard RAID: 0, 1, 5, 6, 10
- Synology: SHR & SHR-2
- ZFS: Stripe, Mirror, RAIDZ1, RAIDZ2, RAIDZ3
- Unraid: 1 or 2 parity drives
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Accurate Calculations - Accounts for the difference between decimal (TB) and binary (TiB) units, showing you the actual usable capacity (e.g., 12TB drives = 10.91 TiB actual)
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Mixed Drive Sizes - Supports configurations with drives of different sizes, especially useful for SHR, ZFS, and Unraid
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ZFS vdev Support - Configure multiple vdevs within ZFS pools for advanced configurations
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Clear Results - Displays:
- Usable capacity (in both TiB and TB)
- Raw capacity
- Storage efficiency percentage
- Fault tolerance (how many drives can fail)
- Read/write performance insights
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Intuitive Interface - Easy-to-use sliders and dropdowns with real-time validation
📖 How to Use
1. Open the Calculator
Simply open the index.html file in any modern web browser. No installation or server required!
2. Select Your RAID Type
Choose your desired RAID configuration from the dropdown menu. Options are organized by category:
- Standard RAID - Traditional RAID levels (0, 1, 5, 6, 10)
- Synology RAID - SHR and SHR-2 for Synology NAS devices
- ZFS RAID - ZFS configurations including RAIDZ variants
- Unraid - Unraid parity configurations
3. Configure Your Drives
Option A: Uniform Drive Sizes
For arrays with identical drives:
- Use the Number of Drives slider to set how many drives you have (2-24)
- Select the Drive Size (TB) from the dropdown (1TB to 24TB)
Option B: Mixed Drive Sizes
For arrays with different sized drives (perfect for SHR, Unraid, or ZFS):
- Toggle the Mixed Drive Sizes switch to enable custom configuration
- Individual drive size selectors will appear for each drive
- Set the size for each drive independently
Option C: ZFS with Multiple vdevs
For advanced ZFS configurations:
- Select a ZFS RAID type (Mirror, RAIDZ1, RAIDZ2, or RAIDZ3)
- Configure the Number of vdevs slider
- Set Drives per vdev to determine how many drives in each vdev
- The total drive count is calculated automatically
4. Calculate Storage
Click the Calculate Storage button to perform the calculation.
5. Review Results
The results panel will display comprehensive information about your configuration:
Results include:
- Usable Capacity - The actual storage available for your data (shown in both TiB and TB)
- Raw Capacity - Total capacity of all drives combined
- Storage Efficiency - Percentage of raw capacity that's usable
- Fault Tolerance - How many drives can fail simultaneously without data loss
- Performance Insights - Read and write performance characteristics
- Drive Configuration - Summary of your drive setup
💡 Understanding the Results
Capacity Units
The calculator shows capacity in both formats:
- TiB (Tebibytes) - Binary units (1024-based), what your OS reports
- TB (Terabytes) - Decimal units (1000-based), how drives are marketed
Example: A 12TB drive shows as approximately 10.91 TiB in your operating system.
Storage Efficiency
This shows what percentage of your total drive capacity is actually usable:
- RAID 0 - 100% (no redundancy)
- RAID 1 - 50% (full mirroring)
- RAID 5 - Varies based on drive count: (n-1)/n
- RAID 6 - Varies based on drive count: (n-2)/n
- SHR/Unraid - Optimized based on drive sizes
Fault Tolerance
Indicates how many drives can fail before data loss:
- 0 drives - No redundancy (RAID 0, ZFS Stripe)
- 1 drive - Single parity (RAID 5, RAIDZ1, SHR, Unraid-1)
- 2 drives - Double parity (RAID 6, RAIDZ2, SHR-2, Unraid-2)
- 3 drives - Triple parity (RAIDZ3)
🔧 Technical Details
Technology Stack
- Frontend: HTML5, CSS3, JavaScript (ES6+)
- Fonts: Inter (Google Fonts)
- No Dependencies: Pure vanilla JavaScript, no frameworks required
- Client-Side: All calculations performed in the browser
Calculation Methodology
The calculator uses industry-standard formulas for each RAID type:
- Standard RAID - Traditional RAID calculations accounting for parity and mirroring
- Synology SHR - Simulates Synology's hybrid RAID algorithm for optimal space utilization
- ZFS - Accounts for vdev striping and RAIDZ parity overhead
- Unraid - Calculates based on largest drive(s) being used for parity
All calculations account for the binary/decimal conversion (TB to TiB).
🌐 Browser Support
Works on all modern browsers:
- ✅ Chrome/Edge (Chromium-based)
- ✅ Firefox
- ✅ Safari
- ✅ Opera
📱 Responsive Design
The calculator is fully responsive and works on:
- Desktop computers
- Tablets
- Mobile phones
🎯 Use Cases
Perfect for:
- Home Lab Enthusiasts - Planning NAS storage upgrades
- IT Professionals - Calculating storage requirements for clients
- Data Hoarders - Optimizing storage efficiency
- System Administrators - Comparing different RAID configurations
- Students - Learning about RAID technology and storage efficiency
🚀 Getting Started
- Download or clone this repository
- Open
index.htmlin your web browser - Start calculating!
No build process, no dependencies, no installation required.
📄 License
This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.
🎥 Learn More
Visit our YouTube channel @beyondcloudtechnology for tutorials, guides, and tech content.
👨💻 About Beyond Cloud Technology
Professional technology solutions and educational content for IT professionals and enthusiasts.
© 2025 Beyond Cloud Technology. Professional storage planning tool.