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CHAPTER 3
3.
BACKUP COMMAND
The
BACKUP
command allows making copies of entire
MDOS
diskettes.
Options exist for
making
complete
copiesJ
for
file
reorganization
to
consolidate
fragmented
files
and
available spacel
ror appending families
of
files
from
one
diskette
to
another,
and
ror
diskette
comparisons.
The
BACKUP command
will
only copy MDOS=generated diskettes.
The
BACKUP
command
may
also
be
used for copying single-sided
diskettes onto double-sided diskettes.
3. 1
Use
The
BACKUP
command is invoked with the following command
line:
BACKUP
((:<s-unit>1 J:<d-unit>J Li<options>J
where <s-unit> is the source logical unit number, <d-unit> is
the destination logical unit number; and <options> can be one
or more
Or
the option letters described below .
.
If
neither
<s-unit>
nor
<d-unit> is specified on the
command linel
then zero will be used as the source
unit
and
one
will be used as the destination unit.
Specifying only a
single logical unit number on the
command
line
will
cause
zero
to be the source unit and the specified logical unit to
be the destination unit.
Both <s-unit> and (d-unit> must
be
valid
logical
unit
numbers (0-3») <d-unit> cannot be zero,
and the two numbers cannot be the same.
BACKUP
will always copy rrom
the
source
unit
to
the
destination unit (unless diskette comparisons are specified).
I
r
the comma n d
1
i n e
i
s val i d
I
the me s sag e :
BACKUP
FROM
DRIVE
<s-unit> TO <d-unit>?
01'
APPEND FROM DRIVE <s-unit> TO (d-unit>?
will
be
displayed
where <s-unit> is the source unit number
and .<d-unit) is the destination unit number.
In either
easel
a
response of "Y" is required if
BACKUP
is to continue.
Any
other response will return control to
MDOS.
Further
BACKUP
action
depends
on
the
specified options.
The options are
divided
into
"Main
Options"
and
"Other
Options".
Main
Page
03-01
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