The PROM's environment variable bootfile specifies the default boot file. In addition, you must set the environment variable root to the disk partition that IRIX uses as its root file system. The auto command assumes that the desired image of IRIX resides on the partition specified by root of the drive specified in the environment variable bootfile.auto
The bootfile name can contain no more than 14 characters. To select a different boot file, see "Changing Environment Variables".