management
software
uses
the
enclosure
ID
to
provide
a
correlation
between
the
storage
management
graphics
and
the
physical
expansion
enclosure.
The
ID
indicates
which
physical
unit
corresponds
to
the
storage
management
software
status.
Use
the
end
of
a
paper
clip
to
push
the
buttons
on
the
enclosure
ID
switches
X10
and
X1
to
set
the
enclosure
ID
of
the
EXP100
to
any
value
from
0
-
77.
See
Each
expansion
enclosure
that
is
connected
to
a
DS4000
should
have
a
unique
ID.
The
ID
must
be
different
from
all
other
expansion
enclosures
that
are
connected
to
the
DS4000
storage
subsystem.
In
addition,
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.
Give
each
storage
expansion
enclosure
in
a
redundant
drive
loop
a
unique
ones
(x1)
digit
ID.
This
setting
will
enforce
hard
AL_PAs
(unchangeable
between
Fibre
Channel
Loop
Initializations
[LIPs])
for
the
drives
and
facilitate
drive
loop
problem
troubleshooting
in
the
event
of
an
error.
If
the
ID
is
not
unique,
two
or
more
devices
will
have
the
same
hard
AL_PA.
In
such
a
case,
the
controller
will
use
soft
AL_PAs
for
the
devices
that
have
identical
hard
AL_PAs.
Use
the
enclosure
ID
tens
(x10)
digit
setting
for
the
storage
expansion
enclosures
in
the
second
redundant
drive
loop.
The
problem
with
soft
addressing
is
that
addresses
may
change
between
LIPs.
This
possibility
increases
the
difficulty
of
troubleshooting
drive
loop
problems
because
it
is
not
easy
to
ascertain
whether
the
same
device
with
a
different
address
or
a
different
device
may
be
causing
a
problem.
Expansion
enclosure
speed
settings
The
default
switch
setting
is
2
Gbps.
This
is
the
only
speed
setting
allowed
for
the
EXP100.
Attention:
Do
not
remove
the
metal
plate
that
covers
the
expansion
enclosure
speed
setting.
Do
not
adjust
the
expansion
enclosure
speed
setting.
Figure
27.
Enclosure
ID
settings
Chapter
2.
Installing
the
EXP100
45
Summary of Contents for TotalStorage EXP100
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