Recoyery Techniques
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VECTOR 4 USER'S MANUAL
APPENDIX B - TROUBLESHOOT
If
you repeatedly
get
bad sector disk errors using one particular diskette,
then
that
diskette
is probably
defective.
This will sometimes happen with a
new
diskette when you are formatting
it
to
use as backup. After several
attempts,
disc ard
it
or return
it
if
possible. Whenever you
repeat
a disk operation
after
an
error, always unload and reload
the
diskette
to
ensure
that
it
is
seated
correctly.
If
you
still
get
bad
sector
errors,
try copying
to
another diskette using the
DISKCOPY
utility in
CP/M;
on
a hard-disk system, try
to
PIP
the
contents
to
your
hard
disk. If
the
error still occurs, try switching source and destination
drives. Sometimes a
repailitioning
of
diskettes
within
drives
will
result
in
a
successful copy.
If
you
cannot
copy a
diskette
at
all,
then
try
to
"PIP"
it,
file by file,
to
another formatted diskette.
If
the problem is limited
to
one or two
files,
you
will
probably
not
be
able
to
PIP them onto the
new
diskette. But with any
luck,
all
the
other
files
will copy
over
successfully
and
you
will
have
eliminated
the
source of the error (although
it
means losing a file or two).
When
you
get
a bad sector error message,
CP/M
allows you
to
skip
over
the
bad
sector
and
continue
the operation. This is not usually desirable because
the bad
data
will cause other problems. However,
if
there
is
no
other way
to
get
the
file
off
the
diskette
intact,
simply
bypass
the
error
message
by
pressing the
[RETURN] key immediately
after
the
bad
sector
error
message
occurs.
The
disk operation will continue, ignoring the
fact
that
a bad sector
was transferred.
In
a copy,
for
example, the
new
file
may
contain errors which you will have
to
correct
one
at
a time.
You
will have
to
determine
at
the
time
what
the
tradeoff
is
worth:
whether
it
might
be
easier
to
use an earlier (but good)
backup, and duplicate a
little
work; or
to
use
the
latest
(but
error-prone)
diskette and
correct
any errors
that
were copied from the bad diskette.
Again, the
best
way
to
avoid this is
to
use a good, reliable brand
of
diskette
such as Vector Graphic approved diskettes,
and
replace each individual diskette
as often as you need to.
Rev. A -
9-01-82
7100-0001
X B-15
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