A separation of one or more components or elements from the remainder of a processor complex. The separation is by logical boundaries rather than power boundaries. This separation allows simultaneous user operations and maintenance procedures.

• 处理机整体中一个或几个部件与其余部件的分界。这种分界是逻辑上的边界，而不是电源边界。栅栏使得用户操作和维护过程可以同时进行。