A unique aspect of the Apple Network Servers is their case: It is fully lockable and extremely accessible, it features a small LCD for diagnostics, and its front has seven device slots, with a CD-ROM and one hard drive mounted in them in the standard configuration. Additional hot-swappable SCSI hard drive modules or a DAT tape streamer can be added to the free slots. Optionally, the ANS 700 also supports redundant and hot-swappable power supply units and an internal drive rack for two further fixed hard drives. The case is large and heavy, at a height of , a width of , a depth of and a weight of over , with exact weight depending on hardware configuration. That means that while it is about the right width for a 19-inch rack, it requires at least 14 rack units in height. A third model in a smaller rack-mount case without the large disk array, the Network Server 300 (code named "Deep Dish", as in a deep dish pizza), never got past the prototype stage. Also in development but never released were CPU cards featuring two CPUs. Power Macintosh 9500 CPU cards, which were available with dual processors, were not compatible with the ANS.