There is no such thing as a server pool if by that you mean the way it was done in WHS1 with Drive Extender. External hard disks are recommended for server backups only, albeit you can use them for data storage as they are initially given a drive letter.
From the online documentation:
To increase the storage on the server, you can add an additional internal hard disk to the server. To add the additional
internal hard disk, you must first shut down the server, next add the internal hard disk, and then power it back on to restart the server. Next, depending on whether the hard disk to be added is formatted, or unformatted, do one of the following:
- If you had an internal hard disk that is unformatted, it generates the alert- “One or more unformatted hard disks are connected to the server”. Launch the Alert Viewer from the Dashboard, select the alert, and follow the instructions
to format the hard disk and use it to store server folders.
- If the internal hard disk is formatted with NTFS, the server assigns it a drive letter, and the hard disk appears in the Hard Drives tab. You can now either create, or move server folders to the new hard drive. If the formatted hard disk also includes preexisting
files, then you can remove any unwanted files using the Drive Clean up utility.
When an unformatted internal hard disk is detected on the server, a health alert guides the user through the process of formatting the hard disk. It is recommended that you use external hard disks only for backing up the server.
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