Checking
the
grounding
of
the
2104
Model
DS4
Perform
the
following
steps
to
check
the
grounding
of
the
2104
Model
DS4:
1.
Ensure
that
all
power
is
removed
from
the
rack.
See
the
installation
document
for
the
rack
or
host
system.
2.
Ensure
that
the
power
cables
2
are
plugged
into
each
fan-and-power-supply
assembly.
See
Figure
7.
Also
ensure
that
the
other
ends
of
the
power
cables
are
unplugged
from
the
power
distribution
unit
or
battery-backup
unit
in
the
rack.
See
the
installation
document
for
the
rack
or
host
system.
3.
Attention:
Some
electrical
circuits
could
be
damaged
if
the
external
SCSI
cables
are
connected
to
the
2104
Model
DS4
while
the
grounding
check
is
being
done.
Ensure
that
no
external
SCSI
cables
are
plugged
at
the
connectors
1
.
4.
Check
the
grounding
of
the
2104
Model
DS4:
a.
At
the
connector
ends
of
the
power
plugs
that
you
unplugged
from
the
power
distribution
unit
or
battery-backup
unit
in
step
2,
do
a
visual
inspection
and
ensure
that
the
third
wire
ground
pin
is
in
good
condition.
b.
Use
an
ohm
meter
to
connect
one
lead
to
the
2104
Model
DS4
chassis
and
the
other
lead
to
the
third
wire
ground
pin
at
the
face
of
the
power
connectors
that
you
unplugged
in
step
2.
You
should
read
0.1
ohm
or
less
between
the
ground
pin
on
the
power
connector
and
the
2104
Model
DS4
chassis.
SC000210
Figure
7.
Power
cables
and
SCSI
connectors
on
the
2104
Model
DS4
Safety
and
environmental
notices
xv
Summary of Contents for 2104 Model DS4
Page 2: ......
Page 3: ...Expandable Storage Plus 2104 Model DS4 Installation Guide GA22 1053 00 ...
Page 9: ...Tables 1 Valid configurations 37 Copyright IBM Corp 2003 vii ...
Page 10: ...viii Expandable Storage Plus 2104 Model DS4 Installation Guide ...
Page 30: ...xxviii Expandable Storage Plus 2104 Model DS4 Installation Guide ...
Page 90: ...58 Expandable Storage Plus 2104 Model DS4 Installation Guide ...
Page 98: ...66 Expandable Storage Plus 2104 Model DS4 Installation Guide ...
Page 101: ......
Page 102: ... Part Number 97P1535 Printed in USA GA22 1053 00 1P P N 97P1535 ...
