IBM 1130 User Manual page 477

Section
Subsections Page
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How Can I Make More Space Available?
Using Figure 60.2 as your guide, take a look at
each of the five logical areas, with an eye toward
removing items you don't need:
Cylinder 0
Since Cylinder 0 is always present and necessary on
every disk cartridge, there is nothing you can do to
reduce its size.
IBM Systems Area
Every system disk cartridge, after initial loading
with the Monitor, contains the Assembler and
FORTRAN compiler, two programs of substantial
size. The Assembler occupies 32 sectors; the
FORTRAN compiler occupies 88 sectors.
If you rarely compile programs written in Assem-
bler Language, you will probably want to delete the
Assembler from all disk cartridges except the one
used for odd jobs.
Most 1130 users program in FORTRAN, but it is
still possible to eliminate this compiler from some
disk cartridges. Suppose you have a large inventory
file that requires all the room you can get. Why
keep the FORTRAN compiler on that disk?
During the test phase, when you are compiling
many FORTRAN programs, you certainly need the
compiler; once the programs have been debugged,
however, you can eliminate it and increase the size
of your file by 88 sectors. If it becomes necessary
to change a program on a particular disk, you can
recompile the new version using a disk that does
contain the compiler, dump the new program on
cards with the DUP, remove the FORTRAN disk,
replace it with the inventory (no FORTRAN) disk,
and load the new card program with DUP. Because
this takes a few minutes, you will probably not want
to eliminate the FORTRAN compiler from any disk
unless the space is needed.
To delete these two programs from a disk, you
must use the DUP *DEFINE function, as shown
below
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