RAID Storage Array Documentation
What is RAID?
RAID (Redundant Array of Independent Disks) is a technology that combines multiple hard drives into a single logical storage unit. This technology improves data read/write performance and reliability.
Why Use RAID?
Improved Performance
- Increases data transfer speeds through parallel disk read/write
- Reduces I/O bottlenecks
Enhanced Data Reliability
- Provides fault tolerance through data redundancy
- Protects data in case of disk failure
Increased Storage Capacity
- Combines multiple physical disks into larger logical volumes
- Simplifies storage management
Common RAID Levels and Calculation Formulas
RAID 0 (Striping)
RAID 1 (Mirroring)
RAID 5 (Striping with Parity)
RAID 6 (Striping with Double Parity)
RAID 10 (RAID 1+0)
RAID Selection Guidelines
Performance Priority: Choose RAID 0
- Suitable for temporary data or scenarios with other backup solutions
Data Security Priority: Choose RAID 1
- Suitable for critical small-capacity data storage
Balance of Performance and Security: Choose RAID 5
- Suitable for most enterprise storage scenarios
High Reliability Requirements: Choose RAID 6
- Suitable for large capacity storage and long-term archiving
Critical Business Systems: Choose RAID 10
- Suitable for scenarios requiring both high performance and reliability
Important Notes
- RAID is not a substitute for backups
- Use identical disk models and capacities when building RAID
- Enterprise-grade drives provide better reliability
- Regularly check RAID status and disk health
- Configure appropriate spare disks for failure recovery