OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb
/s
1 Gb
/s
OUT
IN
!
2 Gb
/s
1 Gb
/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb/s
1 Gb/s
OUT
IN
!
2 Gb
/s
1 Gb
/s
OUT
IN
!
2 Gb/s
1 Gb/s
Host 1, Host Adapter 1 and 2
Host 4, Host Adapter 1 and 2
Host 2, Host Adapter 1 and 2
Host 3, Host Adapter 1 and 2
Host 1
Host 4
Host 2
Host 3
For
additional
information
about
host-side
cabling,
refer
to
the
IBM
TotalStorage
DS4500
Fibre
Channel
Storage
Subsystem
Installation,
User's,
and
Maintenance
Guide
.
Drive-side
fibre-channel
cabling
The
DS4500
Storage
Subsystem
supports
up
to
two
redundant
drive
loops.
A
redundant
drive
loop
consists
of
one
or
more
storage
expansion
enclosures
connected
to
a
controller
using
two
sets
of
fibre
channel
cables.
If
one
data
path
fails,
the
controller
uses
the
other
data
path
to
maintain
the
connection
to
the
drive
group.
Figure
3.
DS4500
Storage
Subsystem
host
adapter
connections
(direct-attached)
5
