Controls
and
lights
This
section
describes
the
switches
and
lights
on
a
2104
Model
DS4
and
Model
TS4.
The
2104
Model
DS4
or
Model
TS4
has
no
main
power
switch.
However,
each
fan-and-power-supply
assembly
has
an
on/standby
switch.
Figure
21
shows
the
lights
on
the
front
of
the
2104
Model
DS4
and
Model
TS4.
Power
light
1
The
power
light,
which
is
green,
comes
on.
It
stays
on
continuously
when
power
is
supplied
to
the
2104
Model
DS4
and
Model
TS4
by
one
or
both
of
the
fan-and-power-supply
assemblies
within
the
2104
Model
DS4
and
Model
TS4.
Check
light
2
The
check
light,
which
is
amber,
comes
on
if
a
failure
occurs
in
the
2104
Model
DS4
and
Model
TS4.
Note:
The
2104
Model
DS4
and
Model
TS4
might
be
able
to
continue
operating
correctly
even
when
the
failure
of
a
single
part
is
detected.
Unit
identify
light
3
The
unit
identify
light,
which
is
blue,
comes
on
as
a
“Unit
Identify”.
This
feature
is
not
used
at
this
time.
1
1
2
2
SC000218
3
3
Figure
21.
Disk
enclosure
lights
on
a
2104
Model
TS4
(left)
and
a
2104
Model
DS4
(right)
6
Expandable
Storage
Plus
2104
Model
DS4
and
Model
TS4
Operator’s
Guide
Summary of Contents for Bull Escala 2104 DS4
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