To perform a "powercycle" or restart of the FlashArray system as typically requested by Support for diagnostic or initialization purposes, the correct and safe method is to run the purearray reboot command.

While the term "power cycle" often implies a physical interruption of power in general IT terminology, Pure Storage FlashArrays are designed as "Always-On" systems and do not have standard physical power buttons on the controllers for this purpose (Option A is incorrect as no such button exists for system-wide power cycling). Physically unplugging the power cables (Option B) constitutes a "hard" power cycle or "cold boot," which is generally reserved for specific hardware replacements or emergency procedures, not standard support requests on a healthy or newly installed system.

The purearray reboot command gracefully shuts down the Purity operating system services, flushes data from the volatile memory to the non-volatile storage, and restarts both controllers sequentially or simultaneously depending on the arguments. This ensures that the system returns to a clean state without the risk of data inconsistency or "dirty" shutdowns that physical cable removal might cause. In the context of a new installation or support troubleshooting, this software-driven restart is the standard procedure.