selected
device,
restores
that
file
to
/tmp
,
and
compares
the
original
file
to
the
restored
file.
The
restored
file
remains
in
/tmp
to
allow
for
visual
comparison.
All
errors
are
reported.
Certify
Media
This
task
allows
the
selection
of
diskette,
DVD-RAM
media,
or
hard
files
to
be
certified.
Normally,
this
is
done
under
the
following
conditions:
v
To
determine
the
condition
of
the
drive
and
media
v
To
verify
that
the
media
is
error-free
after
a
Format
Service
Aid
has
been
run
on
the
media
Normally,
run
Certify
if
after
running
diagnostics
on
a
drive
and
its
media,
no
problem
is
found,
but
you
suspect
that
a
problem
still
exists.
Hard
files
can
be
connected
either
to
a
SCSI
adapter
(non-RAID)
or
a
PCI
SCSI
RAID
adapter.
The
usage
and
criteria
for
a
hard
file
connected
to
a
non-RAID
SCSI
adapter
are
different
from
those
for
a
hard
file
connected
to
a
PCI
SCSI
RAID
adapter.
Certify
Media
can
be
used
in
the
following
ways:
v
Certify
Diskette
This
selection
enables
you
to
verify
the
data
written
on
a
diskette.
When
you
select
this
service
aid,
a
menu
asks
you
to
select
the
type
of
diskette
being
verified.
The
program
then
reads
all
of
the
ID
and
data
fields
on
the
diskette
one
time
and
displays
the
total
number
of
bad
sectors
found.
v
Certify
DVD-RAM
media
This
selection
reads
all
of
the
ID
and
data
fields.
It
checks
for
bad
data
and
counts
all
errors
encountered.
If
an
unrecovered
error
occurs,
or
recovered
errors
exceed
the
threshold
value,
the
data
on
the
media
should
be
transferred
to
other
media
and
the
original
media
should
be
discarded.
The
Certify
service
aid
displays
the
following
information:
–
Capacity
in
bytes
–
Number
of
Data
Errors
Not
Recovered
–
Number
of
Equipment
Check
Errors
–
Number
of
Recovered
Errors
If
the
drive
is
reset
during
a
certify
operation,
the
operation
is
restarted.
If
the
drive
is
reset
again,
the
certify
operation
is
terminated,
and
the
user
is
asked
to
run
diagnostics
on
the
drive.
This
task
can
be
run
directly
from
the
AIX
command
line.
See
the
following
command
syntax:
diag
-c
-d
-T
certify
Flag
Description
-c
No
console
mode
-d
Specifies
a
device
-T
Specifies
the
certify
task
v
Certify
Hard
file
Attached
to
a
Non-RAID
and
PCI-X
RAID
SCSI
Adapter
For
pdisks
and
hdisks,
this
selection
reads
all
of
the
ID
and
data
fields
on
the
hard
file.
If
bad-data
errors
are
encountered,
the
certify
operation
counts
the
errors.
If
there
are
non-recovered
data
errors
that
do
not
exceed
the
threshold
value,
do
one
of
the
following:
For
hdisk
hard
files,
the
hard
file
must
be
formatted
and
then
certified
again.
For
pdisk
hard
files,
diagnostics
should
be
run
on
the
parent
adapter.
If
the
non-recovered
data
errors,
recovered
data
errors,
recovered
and
non-recovered
equipment
errors
exceed
the
threshold
values,
the
hard
file
must
be
replaced.
76
Eserver
pSeries
655
User’s
Guide
Summary of Contents for p 655 series
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