The standard procedure for replacing a failed or failing NVMe drive in a Dell PowerStore system is a non-disruptive operation. The process requires two mandatory steps. First, the administrator must use the PowerStore Manager software to "Mark drive for removal." This action gracefully prepares the system by stopping I/O to the specific drive and ensuring data integrity. Second, after the system indicates it is safe to proceed (typically via an LED change), the drive must be physically removed and replaced with a new one. The system then automatically recognizes the new hardware and initiates the necessary data rebuild processes.

B. Place system in service mode: Service mode is a specific state for performing disruptive maintenance that affects an entire node or cluster, which is not required for a routine, hot-swappable component replacement like a drive.

D. Disconnect all host connections: PowerStore is designed for high availability. Disconnecting hosts would cause an unnecessary and severe service outage. Drive replacements are designed to be performed online without impacting host connectivity.

1. Dell PowerStore: Servicing Your System Guide. In the section "Drives > Replace a drive

" the procedure explicitly details the steps: "1. In PowerStore Manager

select the Hardware tab. ... 4. Select the drive that you want to replace and select Mark for Removal. ... 6. After the drive is marked for removal

physically remove the drive from the slot." This document confirms that marking the drive for removal and the physical swap are the core steps.

2. Dell PowerStore: Service Concepts Guide. This guide explains the purpose of different system modes. It clarifies that Service Mode is intended for specific

potentially disruptive service actions

distinguishing it from routine hardware replacements like drive swaps

which are performed in Normal Mode. This supports why option B is incorrect.

3. Dell PowerStore: Hardware Information Guide. This document describes the physical components

including the hot-swappable nature of the NVMe drives. The design for hot-swapping is fundamental to performing replacements without system downtime or disconnecting hosts

which invalidates option D.