Operating
system
watchdog
timer
feature
causes
inadvertent
system
restarts
Description:
The
operating
system
watchdog
timer
feature
specifies
the
number
of
minutes
between
checks
of
the
operating
system
by
the
Remote
Supervisor
Adapter.
If
the
operating
system
fails
to
respond,
the
Remote
Supervisor
Adapter
generates
an
OS
timeout
alert
and
restarts
the
server.
The
xSeries
455
server
might
inadvertently
restart
when
the
operating
system
is
running
normally,
if
you
enable
the
feature.
Solution:
If
you
enable
the
operating
system
watchdog
timer
feature,
define
the
timeout
period
as
the
maximum
of
four
minutes.
The
default
setting
for
the
feature
is
disabled.
Replacing
the
Remote
Supervisor
Adapter
The
Extensible
Firmware
Interface
(EFI)
in
the
xSeries
455
server
stores
its
variables
with
nonvolatile
attributes
in
NVRAM
on
the
Remote
Supervisor
Adapter.
Before
you
remove
or
replace
the
Remote
Supervisor
Adapter
or
clear
the
NVRAM,
be
sure
to
make
a
backup
copy
of
the
nonvolatile
EFI
variables.
After
you
install
a
new
Remote
Supervisor
Adapter,
you
must
restore
the
EFI
variables
previously
stored
in
NVRAM.
The
following
EFI
variables
are
stored
in
NVRAM
on
the
Remote
Supervisor
Adapter:
v
Console
definitions
v
Boot
options
and
device
drivers
v
Boot
order
and
timeout
You
can
use
the
xSeries
455
Backup
and
Restore
utilities
to
back
up
or
restore
the
nonvolatile
EFI
variables
that
are
stored
in
NVRAM.
These
utilities
are
included
in
the
most
current
version
of
the
System
Abstraction
Layer
Extensible
Firmware
Interface
(SAL/EFI)
code.
See
and
for
instructions.
Creating
a
backup
copy
of
the
nonvolatile
EFI
variables
Complete
the
following
steps
to
create
a
backup
copy
of
the
EFI
variables:
1.
Make
sure
that
the
formatted
medium
where
you
plan
to
store
the
backup
file
is
inserted.
2.
Start
the
server.
3.
Select
EFI
Shell
from
the
EFI
Firmware
Boot
Manager.
4.
Change
to
the
file
system
for
the
formatted
medium
where
you
want
to
store
the
backup
copy.
5.
Type
the
following
EFI
command
to
create
a
backup
copy
of
the
EFI
variables:
backup
filename
Where
filename
is
the
name
(eight-characters
or
fewer)
that
you
want
to
assign
to
the
backup
copy
(for
example,
efibckup.001).
6.
Type
dir
or
Is
to
verify
that
the
backup
file
was
created
successfully.
Restoring
the
nonvolatile
EFI
variables
Complete
the
following
steps
to
restore
the
nonvolatile
EFI
variable
settings:
1.
Make
sure
that
the
formatted
medium
that
contains
the
backup
copy
of
the
EFI
variables
is
inserted.
28
xSeries
455
FAQ:
Hints
and
Tips
Summary of Contents for Eserver xSeries 455
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