Fibre channel connections, Fibre channel loop configurations, Fibre – IBM Partner Pavilion DS4100 User Manual
Page 68: Channel, Connections, Loop, Configurations, Direct, Out-of-band), Managed
Ethernet
Host computer
Controller
Controller
Controller
Controller
Fibre Channel
I/O path
Management station
Note: The client software is
installed on one or more
management systems,
or on the host computer.
Storage subsystems
f10ug008
Fibre
channel
connections
The
storage
server
fibre
channel
connection
consists
of
up
to
four
host
fibre-channel
loops
and
a
redundant
drive
fibre-channel
loop.
The
host
fibre-channel
loops
provide
the
fibre
path
for
host
attachment.
They
can
consist
of
fibre-channel
cables,
SFPs,
host
bus
adapters,
fibre-channel
switches,
and
RAID
controllers.
The
redundant
drive
fibre-channel
loop
provides
the
fibre
path
to
the
hard
disk
drives
(HDDs).
The
redundant
drive
fibre-channel
loop
consists
of
fibre
channel
HDDs
and
optional
storage
expansion
units,
fibre-channel
cables,
and
SFPs.
Exception:
The
DS4100
single-controller
storage
server
does
not
support
drive
loops
or
expansion
units.
The
DS4100
base
storage
server
supports
redundant
disk-drive-loop
configurations.
Each
RAID
controller
has
three
SFP
ports.
These
SFP
ports
are
labeled
Host
1,
Host
2,
and
Expansion.
You
can
build
a
redundant
drive
loop
by
connecting
one
or
more
expansion
units
to
the
redundant
RAID
controllers.
Then,
use
dual
fiber-optic
cables
to
connect
one
expansion
unit
to
another
in
a
daisy-chain.
For
more
information
about
adding
expansion
units,
see
Fibre
channel
loop
configurations
You
must
determine
how
the
host
systems
will
connect
to
the
storage
server.
You
can
connect
up
to
two
host
systems
directly
to
the
storage
server,
or
you
can
Figure
24.
Direct
(out-of-band)
managed
storage
subsystems
36
IBM
TotalStorage
DS4100
Storage
Server:
Installation,
User’s,
and
Maintenance
Guide