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Additional
service
information
This
section
provides
additional
service
information
about
the
Type
3526
fibre
channel
RAID
controller.
Powering
on
the
controller
Note:
All
drive
modules
must
be
powered
on
before
you
power
on
the
controller.
The
controller
might
take
from
three
to
10
seconds
to
power
on.
During
this
time,
the
amber
and
green
LEDs
on
the
controller
unit
flash.
After
power
on,
check
all
fault
LEDs
to
make
sure
they
are
off.
If
a
fault
LED
is
on,
see
the
“Symptom-to-FRU
index”
on
page
32.
Recovering
from
a
power
supply
shutdown
Both
power
supplies
have
a
built-in
temperature
sensor
designed
to
prevent
the
power
supplies
from
overheating.
If
a
temperature
sensor
detects
an
over-temperature
condition
(ambient
air
temperature
of
70°
C
(158°
F)
or
above),
the
overheated
power
supply
automatically
shuts
down.
The
other
power
supply
remains
on
as
long
as
its
temperature
remains
below
70°
C
(158°
F).
If
not,
the
second
power
supply
shuts
down,
which
turns
off
all
power
to
the
controller
unit.
After
the
air
temperature
cools
to
below
70°
C
(158°
F),
the
power
supplies
automatically
restart.
An
automatic
restart
resets
the
controllers,
attempts
to
spin
up
the
drives
(which
has
no
effect
on
the
drives
if
they
are
already
running),
and
returns
the
controller
unit
to
a
normal
operating
state.
Typically,
you
will
not
need
to
perform
recovery
procedures
after
an
automatic
power
supply
shutdown
and
restart.
After
a
power
supply
shutdown,
check
all
controller
LEDs.
If
the
power
supply
power
LED
is
off,
or
the
amber
power
supply
LED
on
the
front
cover
is
on,
go
to
the
“Symptom-to-FRU
index”
on
page
32.
Connectors
and
host
IDs
The
host
ID
switches
and
connectors
for
interface
cables
are
on
the
connector
plate
located
on
the
back
of
the
controller
unit.
Host
and
drive
ID
numbers
Each
controller
must
have
a
unique
Fibre
Host
ID
number
(see
Figure
9
on
page
23).
The
Host
ID
numbers
assigned
to
each
controller
are
based
on
two
elements:
v
Host
ID
numbers
set
through
hardware
switches
on
the
controller
unit.
Five
Host
ID
switches
allow
you
to
set
ID
numbers
0
through
127
for
each
controller.
The
factory
default
settings
are
ID
#5
for
Controller
A
and
ID
#4
for
controller
B.
v
Software
algorithms
that
calculate
the
actual
fibre
channel
address,
based
on
the
controller
unit’s
hardware
settings
and
position
on
the
loop
or
hub
Note:
The
preferred
ID
is
assigned
on
the
fibre
channel
loop
unless
it
is
already
being
used.
If
the
ID
is
already
in
use,
a
soft
ID
is
assigned.
22
IBM
TotalStorage
DS4000:
Hardware
Maintenance
Manual
Summary of Contents for System Storage DS4000
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