The solid-state drives (SSDs) or hard-disk drives (HHDs) in the server are hot-pluggable, but this capability depends on how the drives are configured. To hot-plug a drive you must be able to take the drive offline before you can remove it. When you take the drive offline, you prevent any application from accessing the drive and remove the logical software links to the drive.
The following situations inhibit the ability to perform hot-plugging of a drive:
The drive provides the operating system, and the operating system is not mirrored on another drive.
The drive cannot be logically isolated from the online operations of the server.
If your drive falls into one of these conditions, you must shut down the system before you replace the drive. See Powering Down the Server.
Note - Replacing a drive does not require removing the server from a rack.