Procedure
3:
Verifying
SCSI
Address
Switch
Position
If
your
server
is
not
communicating
with
the
drive,
the
drive’s
SCSI
address
switch
may
be
set
incorrectly:
1.
Check
the
SCSI
address
switch
(
3
in
Figure
4
on
page
3)
to
ensure
that
it
is
set
to
the
SCSI
ID
chosen
in
“Set
the
SCSI
ID”
on
page
9.
2.
Make
sure
that
the
ID
is
not
one
that
is
used
by
another
device
or
the
SCSI
host
adapter
(note
that
because
ID
7
is
the
highest
priority
ID
on
the
SCSI
bus,
it
is
usually
reserved
for
the
primary
SCSI
host
adapter).
3.
If
you
change
a
SCSI
ID,
power
cycle
the
drive
to
effect
the
change.
Procedure
4:
Checking
SCSI
Connections
If
your
server
is
not
communicating
with
the
drive,
the
SCSI
cable
or
terminator
connector
pins
may
be
damaged
or
not
seated
correctly,
or
the
SCSI
bus
length
may
be
incorrect.
1.
Check
whether
the
SCSI
ID
is
unique.
If
not,
select
a
unique
SCSI
ID
and
reconfigure
the
system.
The
new
ID
is
effective
at
the
next
power-on.
2.
Check
whether
the
parameters
for
the
SCSI
adapter
installation
are
correct.
3.
Ensure
that
a
SCSI
terminator
is
attached
to
each
end
of
the
bus
(one
terminator
is
usually
installed
at
the
server).
4.
Ensure
that
no
more
than
two
bus
terminations
(typically,
one
on
the
host
adapter
and
one
at
the
last
device
on
the
bus)
are
present.
5.
Limit
the
number
of
devices
on
the
bus.
6.
Check
that
the
SCSI
connectors
are
properly
seated
(this
includes
the
interposer
[if
used],
terminator,
and
cable
connectors).
Push
the
connectors
into
their
receptacle
connectors,
and
(if
applicable)
tighten
the
retention
screws
until
firmly
seated.
Then,
retry
the
operation.
7.
If
communication
still
fails,
check
all
connector
pins
for
damage.
Remove
the
interposer,
terminator,
and
cable
connectors,
and
inspect
them
for
bent,
recessed,
or
missing
pins.
If
necessary,
replace
the
damaged
component
and
ensure
that
all
connectors
are
properly
seated,
then
retry
the
operation.
8.
If
communication
still
fails,
check
the
length
of
the
SCSI
bus
cable.
If
your
drive
is
the
only
device
on
the
SCSI
bus,
ensure
that
the
total
bus
length
does
not
exceed
25
m
(82
ft).
If
there
are
other
devices
on
the
bus,
ensure
that
the
total
length
does
not
exceed
12
m
(39
ft).
9.
If
communication
still
fails,
run
the
SCSI
wrap
test
(see
“Function
Code
6:
Run
SCSI
Wrap
Test”
on
page
74).
If
the
test
succeeds,
the
problem
may
be
with
the
cables
or
SCSI
host
adapter.
Refer
to
your
server’s
documentation
and
exercise
a
host
utility
to
isolate
the
location
of
the
problem.
If
the
SCSI
wrap
test
fails,
replace
the
terminator
and
run
the
test
again.
Troubleshooting
47
Summary of Contents for TotalStorage 3580 L33
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