Figure
23
shows
the
two
lights
on
each
disk
drive
module.
1
Activity
light
The
activity
light,
which
is
green,
shows
the
following
conditions:
Off
The
SCSI
link
to
the
disk
drive
is
not
active.
Flashing
This
disk
drive
module
is
active,
and
a
command
is
in
progress.
2
Check
light
The
check
light,
which
is
amber,
shows
the
following
conditions:
Off
Normal
operating
condition
Permanently
On
One
of
the
following
conditions:
v
The
service
aid
set
Remove
for
this
disk
drive
module.
For
more
information,
see
“Operating
with
RISC
systems,”
on
page
69.
v
The
disk
drive
reported
a
Predictive
Failure
Analysis
(PFA)
error.
This
error
indicates
that
the
disk
drive
has
had
an
excessive
number
of
internally
recovered
errors.
v
The
disk
drive
is
faulty.
This
is
a
Conner/Intel
SCSI-Accessed
Fault-Tolerant
Enclosures
(SAF-TE)
function.
Flashing
(2
seconds
on,
2
seconds
off)
The
check
light
is
set
by
a
SCSI
service
aid
to
identify
the
position
of
this
disk
drive
module.
Flashing
(0.25
seconds
on,
0.25
seconds
off)
The
disk
drive
is
part
of
an
array
that
is
being
rebuilt
(this
is
a
SAF-TE
function).
Note:
SAF-TE
services
are
not
used
with
RS/6000
or
IBM
Eserver
pSeries
computers.
2
1
SC000929
Figure
23.
Disk
drive
module
lights
8
Expandable
Storage
Plus
2104
Model
DS4
and
Model
TS4
Operator’s
Guide
Summary of Contents for Bull Escala 2104 DS4
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