If you try to remove the drive using the WHS console you will get a message there's not enough space to remove the drive without files being lost; when you remove a drive in that way WHS by default will try and copy the files on the drive to other drives
in the storage pool.
You can however view the files on another system; Power down the server, disconnect the drive (leave sata cable connected to motherboard / controller), connect drive to other system, all the files are in a hidden folder DE in the root of the drive (you may
need to enable view hidden files and folders on the other system). Please note, do NOT change or move any files or folders on the disk, do not boot your server without the disk, when you reconnect the disk make sure you connect it to the same SATA port.
Henk Panneman - http://www.homeserverweb.nl