VECTOR
GRAPHIC, INC.
ERROR
HANDLING
"Bad Sector" Disk Errors
Bad
sector disk errors
are
reported on the screen in the following format:
ERROR - drive:<error>
They
usually
indicate
some
simple
problem with the diskette. However, the
problem
may
also come from
the
drive or the disk controller board.
If
one
of
these errors occurs, repeat
the
procedure
that
resulted in
the
error.
If
the error oCcurs again,
refer
to
the
section below on
recovery
techniques.
If
you
consistently
get
such disk
errors,
be
sure
to
use
Vector
Graphic
approved diskettes.
If
the errors
persist,
check
your
service
agreement
for
the
appropriate action.
There
are
several
errors
which
the
Basic
Disk
Operating
System (BDOS)
detects.
The
BDOS
prints
the
error
in
the
format
listed
above,
replacing
<error> with one of
the
following messages:
DmK READ/WRITE(xxyy)
The
DISK READ/WRITE message will display when the disk controller
detects
an error in reading or writing
to
the disk. Here, "xx"
stands
for
a
hex
code
denoting
the
particular
physical
BIOS
error
detected
by
the
physical disk
driver;
nyy"
corresponds
to
the BnOS physical and extended
error
codes.
See
the
Programmer's
Manual
for
an
explanation of all the error codes you
may
encounter.
This
error
message
generally
displays either because of a malfunction in the
disk controller, or because of a badly-worn
diskette.
If
your
system
reports
this
error
more
than
once
a month, your disk surface should be replaced or
your system serviced.
Recovery
from
this
condition
may
be accomplished
by
responding
to
the next
prompt:
PRESS
[CTRL C]
TO
REBOOT OR
[RETURN]
TO
CONTINUE
Entering
a [CTRL C] will abort the current program and return control
to
the
CCP. PresSing [RETURN] will cause the error
to
be ignored by
the
program
and execution will continue normally.
You should only press [RETURN] when copying a
fUe
for which
it
is important
that
as much
of
the
file
be
recovered
as
possible.
Note,
however,
that
entering
a [RETURN} may
destroy
diskette
integrity
if
the
operation is a
X
B-12
7100-0001
9-01-82 - Rev. A
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