Chapter 3 Connect the Back End
56
Storage Center SC8000 Controller Deployment Guide
SC8000 SAS Port Types
There
are
two
types
of
controller
SAS
ports:
initiator
only
and
initiator/target.
SAS
chains
begin
with
an
initiator
port.
As
shown
in
the
following
figure,
ports
1–2
(circled
in
blue)
on
SAS
IO
cards
are
initiator
only,
and
ports
3–4
(circled
in
red)
are
initiator/target.
Figure 52. Controller SAS Port Types
Connect IPC for Dual-Controller Storage Centers
If
you
are
configuring
a
dual
‐
controller
Storage
Center,
connect
the
controllers
with
a
Category
(Cat)
6
Ethernet
cable.
If
the
Storage
Center
only
uses
a
single
SAS
chain,
you
must
also
interconnect
the
controllers
with
additional
SAS
connections
to
make
sure
that
sufficient
IPC
bandwidth
is
available.
1
Initiator Only (Ports 1–2)
2
Initiator/Target (Ports 3–4)
1
2
