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To
use
SCSI
hard
disk
drives
with
your
blade
server,
install
a
SCSI
storage
expansion
unit,
such
as
the
IBM
BladeCenter
SCSI
Storage
Expansion
Unit,
on
the
blade
server.
You
will
then
be
able
to
install
two
3.5-inch,
hot-swap,
SCSI,
1-inch
(26
mm)
slim-high
hard
disk
drives
in
the
expansion
unit,
for
use
by
the
blade
server.
The
SCSI
controller
in
the
BladeCenter
SCSI
storage
expansion
unit
supports
embedded
mirroring,
which
is
similar
to
RAID
level-1.
Important:
To
avoid
potential
performance
and
reliability
problems
when
configuring
or
replacing
drives
in
a
mirrored
configuration,
make
sure
that
the
storage
capacities
and
speeds
of
the
drives
are
identical.
After
you
install
the
SCSI
storage
expansion
unit
on
your
blade
server,
the
blade
server
and
expansion
unit
are
a
unit
that
occupies
three
blade
bays
in
the
BladeCenter
unit.
Attention:
To
ensure
proper
cooling
and
system
reliability,
make
sure
that
each
of
the
SCSI
hard
disk
drive
bays
on
the
SCSI
storage
expansion
unit
contains
either
a
hot-swap
SCSI
hard
disk
drive
or
a
filler
panel.
Complete
the
following
steps
to
install
the
SCSI
storage
expansion
unit.
Note:
The
illustrations
used
in
this
procedure
depict
the
installation
process
on
a
BladeCenter
HS40
blade
server
in
a
BladeCenter
Type
8677
unit.
These
illustrations
might
differ
slightly
from
your
hardware.
However,
this
installation
process
is
the
same
regardless
of
the
BladeCenter
unit.
1.
Review
the
safety
information
beginning
on
page
109
and
“Installation
guidelines”
on
page
33.
2.
Shut
down
the
operating
system,
turn
off
the
blade
server,
and
remove
the
blade
server
from
the
BladeCenter
unit
(see
“Removing
the
blade
server
from
the
BladeCenter
unit”
on
page
39
for
instructions).
3.
Carefully
lay
the
blade
server
on
a
flat,
nonconductive
surface.
52
BladeCenter
HS40
Type
8839:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide