One of the disks in a RAID 5 configuration on a NAS device has failed. Which of the following technologies would BEST allow a technician to replace the failed disk without interrupting service to the

A Fibre Channel array describes a type of storage system and its connectivity, not a specific technology for replacing disks without downtime.

A hot spare disk is a pre-installed spare that automatically rebuilds a RAID array after a disk failure, but it does not describe the technology allowing a technician to physically replace the failed drive while the system is running.

A disk enclosure is the physical housing for disks; while it often supports hot-pluggable disks, the enclosure itself is not the technology that enables live disk replacement.

A hot-pluggable disk is designed to be removed and inserted into a running system without requiring a power down or service interruption. This feature is essential for replacing a failed disk in a RAID 5 configuration while maintaining service availability on a NAS device.