System Startup, Configuration, and Shutdown Reference Manual (32650-90892)

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volume number The part of an address used for a device number whose meaning is
software and device dependent, but is often used to specify a particular volume on a
multivolume disk drive.
volume set A group of up to 255 related disk packs. One volume of the volume set must be
designated as the master volume for the set. Each volume set is assigned a name by which
it is identified and referenced. MPE/iX recognizes both system volume sets and nonsystem,
or mountable, volume sets.
volume set information table (VSIT) A part of a master volume of a volume set
containing the volume set configuration data.
volume testing The verification that the system continues to operate when loaded to each
limit, the determination of what occurs when those limits are exceeded, and the
determination of what occurs when the system is emptied after being in a full state.
VOLUTIL The MPE/iX utility that provides volume initialization and maintenance,
volume label and membership inquiries, and volume space and sector status. Equivalent to
the MPE V/E VINIT subsystem.
welcome message A file containing a greeting and important system information. It is
created by the system operator and displayed each time a user logs onto the system.
work file A temporary file created when a text editor is invoked. A work file is a copy (in
memory) of a permanent disk file. Any changes to the work file are lost unless the user
saves the updated version of the file.
write To put information in a certain place.
write-enable To remove a disk's write-protection, allowing the disk to be written upon.
write-protect To protect stored data so that it cannot be overwritten.