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Ibm 8304 Manual

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v
Verify
Tests:
-
checks
the
integrity
of
the
data
present
on
the
media.
–
Linear
Verify
–
Random
Verify
v
Surface
Scan
Tests:
-
checks
the
drive
media
for
defects.
–
Surface
Scan
(Linear)
–
Surface
Scan
(Aggressive)
-
this
is
disabled
for
normal
customer
use.
–
Surface
Scan
(Random)
v
SMART:
-
checks
the
SMART
functionality
for
drives
that
support
SMART.
–
Start
SMART
Self-Test
–
Get
SMART
test
results
Other
Test
Features:
v
Write-Splice
Repair
-
detects
and
corrects
Error
Correction
Code
errors
during
Verify
tests.
v
Auto
Spin
Down
-
a
gradual
spin
down
of
the
drive
platters
to
avoid
damaging
the
media.
v
Manufacturer
Log
-
an
in-depth
manufacturer
supported
log
of
errors
on
the
drive.
Multitasking:
To
allow
simultaneous
testing
of
multiple
hard
drives
whenever
possible,
the
FDAT
module
is
written
as
a
set
of
multitasking
functions.
Each
drive
under
test
can
run
the
same
test
or
run
a
different
test
at
the
same
time.
Each
subtest
is
written
to
handle
a
single
test
pass
and
all
test
variables
are
kept
track
of
in
a
structure
unique
for
each
drive
.
However,
when
testing
IDE
drives,
FDAT
will
not
perform
simultaneous
testing
of
IDE
drives
that
are
attached
to
the
same
IDE
cable.
For
example,
if
FDAT
is
testing
four
IDE
drives
on
a
PC,
it
will
perform
simultaneous
testing
on
drives
1
and
3
first
(master
drives),
then
perform
tests
on
2
and
4
(slave
drives).
FDAT
will
also
perform
simultaneous
testing
on
a
master
and
slave
that
are
on
separate
IDE
cables,
but
will
not
perform
simultaneous
tests
on
a
master
and
slave
on
the
same
IDE
cable.
This
generally
increases
the
amount
of
time
needed
to
test
multiple
IDE
drives.
Another
limitation
of
FDAT’S
multitasking
capability
is
the
use
of
Ultra
DMA
(UDMA).
Only
one
drive
at
a
time
can
access
the
UDMA
channel
and
the
UDMA
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
vs
non-destructive
testing:
Most
of
the
tests
found
in
FDAT
are
non-destructive.
This
means
that
PCDR
will
preserve
any
data
that
is
present
on
the
tested
media
prior
to
beginning
any
destructive
operations
(i.e.
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
28
Hardware
Maintenance
Manual
… 34 …


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