IBM 1130 User Manual page 487

Section
Subsections Page
60 30
I
20
05
Defining and Modifying the Fixed Area
If you want a Fixed Area on a disk cartridge, you
must not only instruct the monitor to create one,
but you must specify its size.
If you want a Fixed Area of 20 cylinders, you can
run the job
12 3 4 56 78 910 1112 1314 1516 1718 1920 2122 2324 2526 2728 2930
~I
32 3334 3536 3738 3940 4142 3 4 5
II VolE
1/
kJ Iv
I,c;
~f)
£~
doVE
FI
XEO
~R IE4
OiJ
21
and you have it. Note that we specified 21 cylinders
as the size of the Fixed Area. One cylinder will be
used for FLET; the other 20 are available for your
programs and data files.
If later you wish to increase the size of FXby 6
cylinders, you can use
12 34 5 6 78 910 1112 1314 1516 1718 1920 2122 2324 2526 2728 2930 3132 3334 35~ 3738 3940
41~2
3 45
,;,;
lOE.
I I
IN/
foIlD
I£~
Ud
~I xltlo ~~ IE
14
at:
ol~
or, if you wish to decrease its size by 3 cylinders
12 3 4 5 6 78 91Q 11112 1314 1516 1718 1920 2122 2324 2526 2728 2930 3132 3334 3536 3738 39 140 ~I
2
~3~45
II //)18
II I1V~
il-k:lE
IW Ii,
!,tl l(IE~
4,('
itA
0/1
a~1j-
You should keep a record of whether a particular
cartridge has a Fixed Area or not.
If
you ran the
first job, then forgot you ran it, and ran it again,
you would have a 41-cylinder Fixed Area. When in
doubt you may use the DUMPLET DUP option, which
will print the contents of FLET.