Reliability, availability, and serviceability, Reliability, Availability – Lenovo ThinkServer TD100x User Manual
Page 20: Serviceability
eight
industry-standard,
2-way
interleaved,
x4
or
x8,
1.8
V,
240-pin,
double-data-rate
2
(DDR2),
PC2-5300,
677
MHz,
dynamic
random-access
memory
(DRAM)
fully
buffered
(FBD)
dual
inline
memory
modules
(DIMMs).
TD100x
The
server
supports
up
to
48
GB
(reduced
to
24
GB
in
mirrored
mode)
of
system
memory.
The
memory
controller
supports
error
correcting
code
(ECC)
for
up
to
12
240-pin,
DDR1,
PC2-5300,
SDRAM,
667
MHz,
fully
buffered
DIMMs.
v
Memory
mirroring
Some
models
support
memory
mirroring.
Memory
mirroring
replicates
and
stores
data
in
DIMMs
within
two
branches
simultaneously.
To
support
memory
mirroring,
you
must
have
at
least
two
pairs
of
DIMMs
installed
(a
pair
in
each
branch).
Pairs
of
DIMMs
that
are
next
to
each
other
(for
example,
DIMM
slot
1
and
DIMM
slot
4)
within
the
channels
of
the
same
branch
must
be
identical
pairs
of
full-buffered,
dual
inline
memory
modules
(DIMMs).
For
more
information,
see
v
Online-spare
memory
Some
models
support
online-sparing
memory.
Online-spare
memory
disables
a
failed
rank
pair
of
DIMMs
from
the
system
configuration
and
activates
an
online-spare
rank
pair
of
DIMMs
to
replace
the
failed
rank
pair
of
DIMMs.
For
an
online-spare
pair
of
DIMMs
to
be
activated,
you
must
enable
this
feature
and
have
installed
an
additional
pair
of
DIMMs
of
the
same
speed,
type,
size
(or
larger),
and
technology
as
the
failed
pair
of
DIMMs.
For
more
information,
see
v
Redundant
power
capabilities
Some
models
support
up
to
two
835-watt
power
supplies,
which
provide
redundancy
and
hot-swap
capability
for
a
typical
configuration.
If
the
maximum
load
on
the
server
is
less
than
835
watts
and
a
problem
occurs
with
one
of
the
power
supplies,
the
other
power
supply
can
meet
the
power
requirements.
v
ServeRAID
™
support
Some
models
support
ServeRAID
adapters
to
create
redundant
array
of
independent
disks
(RAID)
configurations.
Some
models
also
have
integrated
RAID
level-0
and
level-1
support.
v
Symmetric
multiprocessing
(SMP)
The
server
supports
up
to
two
Intel
Xeon
microprocessors.
Each
microprocessor
provides
symmetric
multiprocessing
capability.
When
you
install
the
second
microprocessor,
this
will
enhance
the
performance
of
the
server.
v
Systems-management
capabilities
The
server
supports
an
optional
Remote
Supervisor
Adapter
II
SlimLine,
which
provides
service-processor
functions
in
addition
to
those
that
the
BMC
provides.
When
this
adapter
is
used
with
the
systems-management
software
that
comes
with
the
server,
you
can
manage
the
functions
of
the
server
locally
and
remotely.
The
Remote
Supervisor
Adapter
II
SlimLine
also
provides
system
monitoring,
event
recording,
and
dial-out
alert
capability.
See
the
documentation
that
comes
with
your
systems-management
software
for
more
information.
Reliability,
availability,
and
serviceability
Three
important
server
design
features
are
reliability,
availability,
and
serviceability
(RAS).
The
RAS
features
help
to
ensure
the
integrity
of
the
data
that
is
stored
in
the
server,
the
availability
of
the
server
when
you
need
it,
and
the
ease
with
which
you
can
diagnose
and
repair
problems.
6
ThinkServer
TD100
and
TD100x
Types
4203,
4204,
4205,
4206,
6398,
6399,
6419,
and
6429:
User
Guide