I have an ESXi 4.0 host that is currently running out of space. I have one open slot for direct attached storage on the host machine. I have bought a new SAS HDD and have installed it into the slot. But now for the life of me, I cannot figure out how to initialize it so that ESXi will recognize that there is more storage available on the host. I am using the free version of ESXi 4.0. I do not have vMotion. I normally connect to the device through the vSphere application. Do I need to put the host into maintenance mode in order to make the storage recognized? Do I do this through vSphere or the console? Is there a way to do this without shutting down the host and shutting down my VMs?