SCSI HD Addition to 4.11 server

Our volume on the netware 4.11 server is nearly full and wanted to know waht the procedure was.

I was told that as we are using Raid 5, and the HD are Hot pluggable, the new drives just need to be slotted in. This has been done without and the Console prompts reconigition that a physical HD has been added

Unsure what to do next, or if they habve to be removed, server downed tha HD added, and than server restarted

Current set up is 4x 9 SCSI Hot Plugable
Want to add 2 more