IBM Partner Pavilion DS4100 User Manual
Fibre
channel
loop
and
ID
settings
When
you
install
a
hard
disk
drive
in
the
expansion
unit,
the
drive
tray
plugs
into
a
printed
circuit
board
called
the
midplane.
The
midplane
sets
the
fibre
channel
loop
ID
automatically,
based
on
the
enclosure
ID
switch
setting
and
the
physical
location
(bay)
of
the
hard
disk
drive.
Server
ID
(enclosure
ID)
settings
The
DS4100
comes
with
a
server
ID
switch
(also
referred
to
as
an
enclosure
ID
switch)
that
is
used
to
identify
the
DS4100
on
a
fibre
channel
loop.
The
server
ID
switch
is
located
on
the
back
of
the
unit,
as
shown
in
Use
the
small
buttons
above
and
below
each
server
ID
digit
to
change
the
server
ID
setting.
Press
the
button
located
above
the
digit
to
lower
the
digit
by
one.
Press
the
button
located
below
the
digit
to
raise
the
digit
by
one.
Note:
Some
storage
servers
ship
with
a
panel
installed
over
the
server
ID
switch
to
prevent
the
server
ID
from
being
changed
accidentally.
If
your
storage
server
has
a
protective
panel
over
the
server
ID
switch,
use
a
pencil
or
a
small
screwdriver
to
change
the
server
ID.
Each
storage
expansion
unit
in
a
DS4000
storage
subsystem
drive
loop
must
have
a
unique
enclosure
ID.
DS4000
controllers
use
a
combination
of
the
enclosure
ID
and
the
number
of
the
physical
slot
that
a
fibre
channel
hard
drive
occupies
to
create
a
unique
fibre
channel
loop
address
or
arbitrated
loop
physical
address
(AL_PA)
for
each
drive
in
a
fibre
channel
drive
loop.
The
enclosure
ID
consists
of
two
digits,
a
tens
digit
(x10)
and
ones
digit
(x1).
Note:
The
DS4100
is
shipped
with
00
as
the
default
server
ID
setting.
If
you
connect
the
storage
server
to
a
DS4000
EXP100,
you
must
set
the
DS4000
EXP100
enclosure
ID
setting
to
a
value
other
than
00.
Each
server
unit
should
have
a
unique
ID
if
it
is
going
to
be
connected
to
other
drive
expansion
units
through
the
drive
loop
ports.
The
Server
ID
setting
is
only
1 Gb/s
2 Gb/s
X10
X1
Tray Number
Conflict
2 Gb/s Enclosure Speed
LED (Green)
LED (Green)
Server ID switch
1 Gb/s
2 Gb/s
X10
X1
Tray Number
Conflict
f10ug046
ID Conflict LED (Amber)
Figure
22.
Enclosure
ID
switches
Chapter
2.
Installing
the
storage
server
33