ESXi Host - Adding More Storage

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?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
The storage controller will need to create an array on the SAS disks, or you will need to add the SAS disks to the existing array.

ESXi has no utilities to create arrays, it depends on the array already presented to the OS on the storage controller.

So you will need to restart the server, and select the storage controller menu or BIOS to configure the disk.

if you click Add Storage does it appear?

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hogefentonAuthor Commented:
I was really hoping that wouldn't be the case.  In vSphere, if I click on Add Storage there is nothing there that indicated that I had plugged in a new HDD into the system.  There is an array already there but it is the same size as it was before I plugged in the HDD.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
You will therefore need to use the Storage Controller Menu or BIOS functions.

ESXi has no storage controller functions to do this.
On a side note, what type of storage controller are you using? Also don't forget just because you are adding two new HD's this does mean you will now have the "X" amount of extra space available. Your RAID type will determine how much usable disk space you have.
hogefentonAuthor Commented:
I am using a Perc 6/i storage controller.  Since this is the last slot in the available direct attached storage, it will need to be a RAID 0 because I need to create a bigger drive space and the current datastore only allows 500GB max VMs.  

hanccocka's answer worked out for me.  Had to boot into the storage controller, clear the foreign status, create a new VD (because of the reason above), then let it reboot.  Once the host came up, I clicked on Add Storage and it found the new drive immediately.  600 GB SAS hdd went in, 558 GB usuable space.  

Now I'm just having trouble copying the VM over to the new VD, but that is a separate issue.  Thanks for the help!
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