IBM QS21 User Guide - Page 20

Reliability, availability, serviceability, features - cell

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I/O buffer DIMM slots Heat sinks Expansion option connectors System XDR memory 1 Light path diagnostics switch Light box Battery I/O buffer DIMM slots Figure 2. BladeCenter components Both Cell/B.E. processors and Cell/B.E. companion chips are underneath the heat sinks and therefore not visible. The Cell/B.E. processors and the system XDR memory are soldered onto the system board and are not removable. Reliability, availability, and serviceability features Three important features in server design are reliability, availability, and serviceability (RAS). These RAS features are designed to help ensure that your blade server is available when you want to use it; and, in the event of a failure, help you easily diagnose and repair the failure with minimal inconvenience. The following is a list of some of the RAS features that your blade server supports: v Transparent CPU Hardware error recovery v ECC for XDR and DDR2 memory v PFA for CEs on the Cell/B.E. companion chip attached I/O Buffer DDR2 DIMMs v Memory Scrubbing on XDR system memory v XDR System memory failure isolation for memory errors to a single memory interface (Cell/B.E.-0 or Cell/B.E.-1 attached) v DDR2 I/O Buffer memory failure isolation to a single DIMM v PCI Bus Parity Blade level features include: v Degraded boot for both XDR and DDR2 memory errors. XDR memory errors may create holes in the memory map. v Automatic server recovery and restart: - Automatic reboot after boot hangs (with switch of the boot flash to the backup image) - Automatic reboot after checkstop (without switch of the boot flash side) v Environmental monitors and alerts v System VPD and VPD on all major electronic components v Lightbox LEDs v System Management Services (SMS) menu support v Checkstop detection with data logging and automated reboot The BladeCenter unit supports the following features: 4 QS21 Installation and User's Guide

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Both
Cell/B.E.
processors
and
Cell/B.E.
companion
chips
are
underneath
the
heat
sinks
and
therefore
not
visible.
The
Cell/B.E.
processors
and
the
system
XDR
memory
are
soldered
onto
the
system
board
and
are
not
removable.
Reliability,
availability,
and
serviceability
features
Three
important
features
in
server
design
are
reliability,
availability,
and
serviceability
(RAS).
These
RAS
features
are
designed
to
help
ensure
that
your
blade
server
is
available
when
you
want
to
use
it;
and,
in
the
event
of
a
failure,
help
you
easily
diagnose
and
repair
the
failure
with
minimal
inconvenience.
The
following
is
a
list
of
some
of
the
RAS
features
that
your
blade
server
supports:
v
Transparent
CPU
Hardware
error
recovery
v
ECC
for
XDR
and
DDR2
memory
v
PFA
for
CEs
on
the
Cell/B.E.
companion
chip
attached
I/O
Buffer
DDR2
DIMMs
v
Memory
Scrubbing
on
XDR
system
memory
v
XDR
System
memory
failure
isolation
for
memory
errors
to
a
single
memory
interface
(Cell/B.E.-0
or
Cell/B.E.-1
attached)
v
DDR2
I/O
Buffer
memory
failure
isolation
to
a
single
DIMM
v
PCI
Bus
Parity
Blade
level
features
include:
v
Degraded
boot
for
both
XDR
and
DDR2
memory
errors.
XDR
memory
errors
may
create
holes
in
the
memory
map.
v
Automatic
server
recovery
and
restart:
–
Automatic
reboot
after
boot
hangs
(with
switch
of
the
boot
flash
to
the
backup
image)
–
Automatic
reboot
after
checkstop
(without
switch
of
the
boot
flash
side)
v
Environmental
monitors
and
alerts
v
System
VPD
and
VPD
on
all
major
electronic
components
v
Lightbox
LEDs
v
System
Management
Services
(SMS)
menu
support
v
Checkstop
detection
with
data
logging
and
automated
reboot
The
BladeCenter
unit
supports
the
following
features:
System XDR
memory
Expansion
option
connectors
Light path
diagnostics
switch
Light box
Battery
I/O buffer DIMM slots
I/O buffer DIMM slots
Heat sinks
1
Figure
2.
BladeCenter
components
4
QS21
Installation
and
User’s
Guide