You must define logicals to point to a disk and optional directory location where the various files will be stored.

When specifying file locations other than II_SYSTEM, you must use a defined concealed logical name rather than the actual disk or directory specification. A concealed logical name is a name that you define to represent a particular directory specification. The install program stores the concealed logical name in the appropriate Ingres logical (for example, in II_DATABASE). It then uses your definition of the concealed logical to ascertain the actual location in which it will create the appropriate directory tree. This makes it easier to change locations later, if necessary. For details, see the System Administrator Guide.

The II_SYSTEM logical should be defined as either a concealed logical or as a device, if that device is a concealed logical. There is no advantage to using a concealed logical for II_SYSTEM, because the install program stores only the translated real device and optional directory specification in the II_SYSTEM logical. For more information, see the appendix “General Reference.”

You must define any logicals other than II_SYSTEM that you use as both “rooted” and “concealed” at the system or group level as appropriate for your installation. A “rooted” logical can be used directly as if it were a device name. A “concealed” logical is one that is not translated any further; that is, the definition is concealed from programs that use them.