DISCUTIL is a standalone utility that lets you perform
various disk operations without the operating system.
It is particularly important when you need to move
files to tape from disks on a system that is logically inoperable,
such as one with directory damage.
(Once you have done so, you then use the RECOVER option of
the VOLUTIL utility on this tape to move the files back onto disk.)
You start the utility by entering DISCUTIL at the Initial System
Load (ISL) prompt from the system console. (You may not use
DISCUTIL at another terminal.) Once
DISCUTIL is loaded and running, the operating system is not available.
