Connect EN-SASx6x12/24 Enclosures
Dell Compellent
91
Dual Controllers, Eight Enclosures, Two Chains
This
illustration
shows
two
SC8000
controllers
cabled
to
eight
SAS
enclosures
in
two
chains.
To
add
redundancy
with
multiple
IO
cards,
add
a
second
SAS
IO
card.
Create
the
A
‐
sides
of
each
chain
on
the
IO
card
in
slot
6
and
create
the
B
‐
sides
of
each
chain
on
the
IO
card
in
slot
5.
If
an
IO
card,
cable,
enclosure,
or
controller
fails,
at
least
one
side
of
a
chain
continues
operating.
IPC
is
optional
in
this
configuration.
Figure 84. Dual SC8000 Controllers, Eight Enclosures, Two Chains
Path
Connections
IPC
(Optional)
Create
IPC
connections
between
both
controllers
on
ports
2
and
4
of
each
IO
card.
Chain
1:
A
Side
1 Controller
A:
slot
6,
port
1
→
Enclosure
1:
top
SBB,
port
C.
2 Starting
with
Enclosure
1,
daisy
‐
chain
the
A
side
of
Chain
1
by
cabling:
top
SBB,
port
B
→
next
enclosure
down:
top
SBB,
port
A.
3 Finish
with
Enclosure 4:
top
SBB,
port
C
?
Controller
B:
slot
6,
port
3.
Chain
1:
B
Side
1 Controller
A:
slot
5,
port
3
→
Enclosure
4:
bottom
SBB,
port
C.
2 Starting
with
Enclosure
4,
daisy
‐
chain
the
B
side
of
Chain
1
by
cabling:
bottom
SBB,
port
B
→
next
enclosure
up:
bottom
SBB,
port
A.
3 Finish
with
Enclosure
1:
bottom
SBB,
port
C
→
Controller
B:
slot
5,
port
1.
Enclosure 1
Enclosure 2
Enclosure 3
Enclosure 4
Controller
Controller A
Enclosure 5
Enclosure 6
Enclosure 7
Enclosure 8
4
2 1
3
4
2 1
3
