A pre-production unit of Apple's upcoming Xserve RAID enterprise level server has leaked. The new Xserve stays is still an aluminum brushed machine like its predecessors, but it uses Serial ATA (SATA) drives instead of regular parallel ATA (IDE) drives. Like the current Xserve RAID, the pre-production unit appears to be able to take up to 7TB of storage (14x500GB). It is expected that Apple will release the new Xserve RAID near the Leopard release date. Xserve RAID starts at $5,999 USD for 1TB of storage and peaks at $12,999 USD for 7TB of storage. If that price tag isn't enough for you, optional features such as cache-backup battery units can always up the ante.