contains
a
hot-swap
hard
disk
drive
backplane
that
you
install
below
the
standard
hot-swap
hard
disk
drive
backplane.
Your
server
supports
a
maximum
of
two
hot-swap
drive
backplanes.
You
can
configure
the
channels
on
the
two
SCSI
backplanes
as
follows:
v
You
can
configure
each
SCSI
channel
(bus)
independently.
This
is
the
only
available
(typical)
backplane
configuration.
In
this
configuration:
–
The
hard
disk
drives
(bays
1
through
6)
that
are
connected
to
the
standard
SCSI
backplane
are
attached
to
channel
B
through
the
internal
SCSI
connector
(J15)
on
the
system
board.
This
is
the
standard
configuration.
You
can
also
attach
the
drives
in
bays
1
through
6
to
an
optional
RAID
or
SCSI
adapter,
as
described
in
this
section.
–
The
hard
disk
drives
(bays
7
through
12)
that
are
connected
to
the
optional
6-Pack
hot-swap
drive
backplane
are
attached
to
an
optional
RAID
or
SCSI
adapter.
Notes:
1.
To
use
the
optional
xSeries
6-Pack
Hot-Swap
Hard
Drive
Expansion
Kit,
you
must
install
a
RAID
or
SCSI
adapter
in
your
server.
For
more
information
about
installing
an
adapter,
see
“Installing
an
adapter”
on
page
53.
2.
The
standard
SCSI
backplane
is
also
known
as
the
hot-swap
hard
disk
drive
backplane.
3.
The
SCSI
backplane
that
comes
with
the
optional
xSeries
6-Pack
Hot-Swap
Hard
Drive
Expansion
Kit
is
also
known
as
the
6-Pack
backplane.
4.
When
you
install
hard
disk
drives,
they
must
have
the
same
speed.
If
you
install
drives
with
different
speeds,
the
server
will
operate
at
the
slower
speed.
For
a
list
of
supported
options
for
your
server,
go
to
http://www.ibm.com/pc/us/compat/
on
the
World
Wide
Web.
5.
Table
12
on
page
111
lists
the
SCSI
identifiers
(IDs)
for
the
standard
SCSI
backplane
and
hard
disk
drives.
Table
13
on
page
111
lists
the
SCSI
IDs
for
the
6-Pack
backplane
and
hard
disk
drives.
6.
Cable
identifiers
are
printed
on
the
cables
that
come
with
your
server
and
options.
Use
these
identifiers
to
connect
the
cables
to
the
correct
connectors.
For
example,
the
hard
disk
drive
cables
are
labeled
“HDD
option.”
62
xSeries
255
Type
8685:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide
Summary of Contents for XSERIES 255 TYPE 8685
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