Which of the following is a common practice for ensuring data redundancy?

RAID configuration is a widely utilized method for ensuring data redundancy. By employing this technology, data is distributed across multiple disks in a way that protects against data loss due to a single disk failure. Various RAID levels, such as RAID 1 (mirroring) and RAID 5 (striping with parity), are designed specifically to enhance availability and provide redundancy. This ensures that if one disk fails, the data can still be accessed from the remaining disks, thus safeguarding against potential data loss.

In contrast, while a virtual pool creation involves organizing storage resources for efficiency, it does not inherently provide redundancy. Load balancing refers to the distribution of workloads across multiple resources and is more focused on performance than data redundancy. Snapshot scheduling is a technique used to create point-in-time copies of data, which is helpful for backup and recovery but does not provide continuous redundancy like RAID. Thus, RAID configuration is the most pertinent option for ensuring data redundancy.