Western Digital is marketing this capacious WD ShareSpace to the home and small-office crowd. Both audiences will appreciate the low price tag, but this box’s several shortcomings and slow speed will leave both audiences wanting.The ShareSpace is housed in a generic-looking gray steel cube. Loosening two captive screws in back and removing the three-sided housing exposes the motherboard and four of Western Digital’s environmentally conscious 2TB Caviar Green drives. The four platters on each drive spins somewhere between 5,400 and 7,200 RPM (Western Digital declines to state the actual speed), and each drive has 32MB of cache. The array comes from the factory in a RAID 5 configuration. Although the hardware also supports span (JBOD), RAID 0, and RAID 1 modes, RAID level migration is not supported. The more fault-tolerant RAID 5 + Spare and RAID 6 arrays are not supported, nor can you configure the drives in multiple volumes or limit the number of drives used in any given configuration.