Quick summary
- What it is: RAID (Redundant Array of Independent Disks) is a technology that combines multiple physical hard drives into a logical unit.
- What it's for: it helps understand how services are hosted, isolated, scaled and protected on a server.
- When to check it: when comparing plans, reviewing performance, analyzing availability or needing more control over the environment.
RAID (Redundant Array of Independent Disks) is a technology that combines multiple physical hard drives into a logical unit. Depending on the configuration (RAID level), data is distributed or replicated among the drives to achieve higher performance, higher fault tolerance or a combination of both.
Common RAID levels
- RAID 0 (Striping): Distributes data evenly across two or more drives to improve read/write performance. Offers no redundancy: if one drive fails, all data is lost.
- RAID 1 (Mirroring): Duplicates all data on two drives. If one fails, the other contains an exact copy. Provides excellent data security but does not improve write performance.
- RAID 5 (Striping with parity): Distributes data and parity across three or more drives. Offers a good balance between performance, capacity and security. Can survive one drive failure.
- RAID 10 (Striping + Mirroring): Combines the benefits of RAID 0 and RAID 1. High availability and good performance; ideal for critical applications.
Benefits of RAID in hosting
- Data security: The redundancy built into most levels protects data against drive failure.
- Higher performance: Some levels improve read/write speed, beneficial for websites with many transactions.
- Operational continuity: In case of drive failure, the system can continue operating while it is replaced and data is reconstructed.
When will you encounter it?
RAID appears in the technical description of VPS and dedicated server plans, in storage specifications for hosting servers, and in articles about data security and server availability.
Why it matters in hosting
Understanding this concept will help you make better decisions when managing your service. In practice, it relates to how services are hosted, isolated, scaled and protected on a server. If it appears in a guide, the control panel or a support response, review the context before making changes.
Related articles
- VPS
- Dedicated Server
- Virtualization
- KVM
- CloudLinux