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BACKUF COMMAND
3.3 -- File Reorganization
File reorganization improves system
e~~icienc~
by:
1.
Consolidating rile segments,
2.
Packing files more closely together,
3.
Clustering related files together,
4.
Operator selection to only copy desired Files,
5.
Reducing
marginal
diskette
errors
by
re~riting
-Piles,
6.
Consolidating directory space.
File reorganization
is
specified with
the
Main
Option
fiR"
on the BACKUP command
1
ine.
Thus,
would
invoke
the
BAC~UP
comm~nd
to reorganize the Tiles on
the source diskette in drive <s-unit> during the
copy
to
the
destination
diskette in drive <d-unit>.
The source diskette
must
be
an
MOOS
diskette.
It
is
unafrected
by
the
reorgani zation.
The message
BAC~UP
FROM
DRIVE
<s-unit> TO <d-unit>?
is
displa~ed
beTore
any
copying
takes place.
Unlike the
complete copy process which
~ill
proceed
immediately
after
the "yn
respon~e
is given by the operator,
the reorganization
process will perform the following initialization
procedure:
First the ID sector is copied (and optionally modified if the
If
I·I
0
P
t i on
wa s s p e c i fie d ) .
5
e con
d
I
the
L
0
c
k
0
u t
C
1
us t e
l '
Allocation
Table
(LCAT)
and
the
Cluster Allocation Table
(CAT) are initialized (user locked out sectors are not copied
during
the
reorganization
process).
Third,
the directory
sectors on the destination
disk
are
zeroed.
Fourth,
the
Bootblock
is
copied.
Fifth,
all of the file names from the
source diskette'S directory are read.
They are
then
sorted
into
alphabetical order, first
by
suffix}
then
by
file name.
After the sorting has been completed
the
~ollowing
message
~ill
be displayed:
ENTER
FILE
COpy SELECTION COMMANDS:
SAVE (5), DELETE (D), PRINT <P), QUIT (G),
NO MORE (CR)
5.
DJ
p,
G,
( CR ) :
indicating
that
the
operator
must
enter
file
selection
commands to speciFy which ril@s from the source diskette
are
to
be copied to the destination diskette.
The first line of
the message
indicates
that
BACXUP
has
reached
the
Tile
selection
stage.
The
second line contains the function of
each file selection command as
~ell
as the letter
that
must
be
used
to issue that command.
The third line is used as a
prompt
for
the
curren't
and
subseq,uent·
rile
selection
commands.
Page
03-04
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