Lenovo 8087 Manuel D’Utilisation
channel
buffer
must
be
kept
high
in
order
to
maintain
a
speed
advantage
over
other
data
transfer
modes.
In
order
to
use
the
UDMA
channel
during
testing,
users
must
disable
the
multitasking
feature.
Destructive
versus
non-destructive
testing:
Most
of
the
tests
found
in
FDAT
are
non-destructive.
This
means
that
PC-Doctor
program
will
preserve
any
data
that
is
present
on
the
tested
media
prior
to
beginning
any
destructive
operations
(such
as
write
operations).
However,
users
can
run
certain
tests
in
destructive
mode
(i.e.
surface
scan
tests).
Destructive
tests
will
speed
up
testing
because
FDAT
does
not
preserve
the
data
on
the
media
prior
to
the
test
beginning.
Unlike
non-destructive
tests,
any
data
present
on
the
media
prior
to
the
test
beginning
is
lost.
FDAT
allows
for
enabling
or
disabling
destructive
tests,
as
well
as
specifying
a
range
of
destructive
and
non-destructive
sectors
on
the
tested
drive.
This
is
done
through
the
configuration
of
the
FDAT.INI.
If
destructive
and
non-destructive
ranges
somehow
overlap,
then
the
overlapped
area
is
considered
non-destructive.
For
example,
if
users
specify
both
destructive
and
non-destructive
ranges
as
the
same,
then
the
entire
drive
is
tested
as
non-destructive.
Quick
and
Full
erase
-
hard
drive
The
diagnostics
program
offers
two
hard
drive
format
utilities:
v
Quick
Erase
Hard
Drive
v
Full
Erase
Hard
Drive
The
Quick
Erase
Hard
Drive
provides
a
DOS
utility
that
performs
the
following:
v
Destroys
the
Master
Boot
Record
(MBR)
on
the
hard
drive.
v
Destroys
all
copies
of
the
FAT
Table
on
all
partitions
(both
the
master
and
backup).
v
Destroys
the
partition
table.
v
Provides
messages
that
warn
the
user
that
this
is
a
non-recoverable
process.
Chapter
5.
Diagnostics
using
PC-Doctor
for
DOS
51