Which approach provides storage path redundancy to prevent a single point of failure between a host and storage?

Which approach provides storage path redundancy to prevent a single point of failure between a host and storage?

• A. Geo-clustering
• B. Multipathing
• C. Offsite backup
• D. Local load balancing

Answer: (B)

Multipathing creates multiple data paths between the host and the storage array, so if one path fails (due to a bad cable, failed HBA, or a switch issue), I/O can continue over another available path. This provides storage path redundancy and fault tolerance, and it can also improve performance by balancing I/O across paths. In practice, host software (MPIO) manages path selection and failover, sometimes using techniques like ALUA to optimize path usage. This specifically addresses preventing a single point of failure on the link between host and storage. Geo-clustering distributes workloads across sites, offsite backup protects data by replication to another location, and local load balancing distributes traffic without guaranteeing alternate storage paths.

Multipathing creates multiple data paths between the host and the storage array, so if one path fails (due to a bad cable, failed HBA, or a switch issue), I/O can continue over another available path. This provides storage path redundancy and fault tolerance, and it can also improve performance by balancing I/O across paths. In practice, host software (MPIO) manages path selection and failover, sometimes using techniques like ALUA to optimize path usage. This specifically addresses preventing a single point of failure on the link between host and storage. Geo-clustering distributes workloads across sites, offsite backup protects data by replication to another location, and local load balancing distributes traffic without guaranteeing alternate storage paths.