CompTIA Server+ (SK0-005)Security and Disaster RecoveryMedium
A server administrator is configuring a new storage solution for a critical application that requires extremely high availability and data redundancy. The solution must ensure that if one storage device fails, another identical device automatically takes over with minimal interruption, and data is continuously synchronized between them. Which technology would best meet these requirements?
- AStorage Area Network (SAN)
- BRAID 5
- CNetwork Attached Storage (NAS)
- DStorage Replication
Show answer & explanationAnswer & explanation
Correct answer: D. Storage Replication
Storage replication ensures that data is continuously copied from a primary storage system to a secondary, identical system. In the event of a primary system failure, the replicated data on the secondary system can be immediately activated, providing high availability and minimal downtime, which aligns with the requirements of automatic takeover and continuous synchronization.
Why the other options are wrong
- A. A SAN provides block-level storage access over a network but doesn't inherently provide automatic failover and synchronization between *systems* without replication.
- B. RAID 5 provides data redundancy within a single storage array but does not protect against the failure of the entire storage system.
- C. NAS provides file-level access storage but doesn't inherently guarantee automatic failover between separate NAS devices without additional replication technologies.
Storage Replication
The process of copying data in real-time or near real-time between two or more storage systems to maintain data consistency and availability.
- Can be synchronous (real-time) or asynchronous (near real-time).
- Essential for disaster recovery and high availability.
- Often used in conjunction with clustering or failover mechanisms.
Memory trick: Replication: It's a 'replica' for seamless takeover!