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REPAIR COMMAND
22.3 -- Directory Sector Check
4.
The
directory
entry's attribute field must have
the least significant byte (unused) set to
zero.
In additionl
the twb
~nused
bytes at the end of a
directory
ent~y
must be set to zero.
5.
The calculated hash index for the file
name
and
suffix
must
locate the directory entry
where
it
currently resides.
An error in
the
hash
index
means
that
the directory entry is inaccessible.
Appendix G contains a detailed description of the
hash i n9
me th
ode
6.
The
system
file
MDOS.SY
must have
a
Retrieval
Information Block
in
a specific physical
sector.
In
addition,
the
other
files
in
the
family
MDOS*.SY must be present in the directory.
If any directory entry fails to meet one
of
the
first
five criteria, REPAIR will display the
entr~
in error as well
as
a message identifying the problem.
The directory entry is
displayed in the following format:
PSN LSN EN NAME SUF RIB
ATTR
NU [HEXNAM HEXSUFJ
where
~he
symbols have the following meanings:
Symbol
PSN
LSN
EN
NAME
SUF
RIB
ATTR
NU
HEXNAM
HEXSUF
Meaning
Directory sector's physical sector number
Directory sector's
log~cal
sector number
Entry number within sector
File name
File suffix
Physical sector number
~f
RIB
Attributes
Not used portion of directory entry
File name in hexadecimal
Suffix in hexadecimal
All
of
the fields
are
displayed as hexadecimal numbers with
the
exception
of
the
file
name
and
sufFix.
If
non-displayable
characters
appear in either the file's name
or suffi
x,
they
wi 11
be shown
as'
percent signs
(7.>'
In
such
cases,
the hexadecimal forms of the file name and suffix are
shown to the right of the directory
entr~.
In the folloll,ling. examples,
the same directory
entry
is
used
so
that
the changes from one to the other can be more
easily detected.
The first line always shows
the
directory
entry.
The
second
line
contains
the error message and
a
prompt to the
user.
If
a "Y"
is entered,
the entry
\&Ii 11
be
removed
from
the
directory (and later the space associated
with that directory
entry
will
be
deallocated).
An
"N"
Page
22-09
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