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BACKUP
COMMAND
3.5 -- Diskette Verification
SECTOR
nnnn
OFFSET ii
DR<s-unit~-JJ
DR<d-unit/-kk
where
tlii"
is the hexadecimal
orrset
into
physical
sector
it
n n n n
If I
II
J J
II
i s
the
hex
a dec
i
ma
1
con
ten t s
0
f
the sec tor
I
s b Y
t
e
on the source diskette, and
rt1c1c"
is the hexadecimal
contents
of
the respective sector's byte on the destination diskette.
If all
sectors compare, no messages are displayed.
Arter the
verification has completedJ
control is returned to MDOS.
If an EXORdisk III system is being used,
diskette cannot be a
single-sided
diskette
the destination
if
the
source
such cases the
diskette
is
a
double-sided
diskette.
In
message
INVALID TO COPY/VERIFY FROM DOUBLE TO SINGLE SIDED
will
be
displayed
and
control
returned
to
MDOS.
The
oppositeJ
however,
is
allowed;
that
iSI
a
single-sided
diskette can be verified against a double-sided diskette.
3.6
Other Options
The Other
Options
described
briefly
in
section
3.1
cannot be used indiscriminately with any of the Main Options.
This section serves to
~ully
explain the use
o~
each
Other
Option.
Other
Valid with
Function
Option
Main Option
C
any
The
"C"
option
will
cause the copy or
veriTY process
to
continue
even
if
a
retryable
read/w~ite
error
occur~ed
~hich
could not be
corrected.
The
retryable
errors
inc
1 ud
e
CRe,
see
k
I
data mar
k
I
and
address mark
CRe
errors.
The
"c"
option
will
not
cause
read/write
errors
on
Retrieval
InTormation
Blocks
to
be
ignored.
D
any
The
"0"
option
will
cause the copy or
verify process
to
continue
even
iT
a
deleted
data
mark
error
is
detected.
This option allows
the
verification
of
diskettes
that
have
had
bad
sectors
locked out during the
DOSGEN
or
REPAIR
process
(such sectors are flagged with a
deleted
data
mark).
The
"D"
option
permits a user to copy the maximum amount
oT data from a bad source diskette
to
a
good destination diskette.
Page
03-11
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