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not contain a system bootstrap and the SD area wi II beg in
at sector
0
of track
20.
(Track
20
is effectivel y track
0
of
cylinder 1.)
AREA WRITE PROTECTION
Each area will have a protection code assigned to it.
Th is
protection code is checked by the RAD Editor area mainte-
nance commands to prevent inadvertent loss of critical files.
The protection codes are
Protection
Code
NO
BG
Meaning
- - - -
No restriction (i.e., unprotected area).
Only files with NO write protection may
be added, deleted, etc., without
restriction.
Backg round fi I es and unprotected fi les
(i. e., NO write protection) may be
added, deleted, etc., without restriction.
Protection
Code
FG
SY
Meaning
Foreground and unprotected fi les may be
added if an SY key-in is in effect.
Files with any write protection may
be
added if an SY key-in is in effect.
The following areas have fixed protection codes:
Area
Protection Code
S
P, 5 L,
SD
SY
FP, CP
FG
BP, BT
BG
The other areas may have an area protection code assigned
during SYSGEN. If none is specified, the default is SY.
Disk Storage Allocation Guidel ines
23
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