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56 SPARC Enterprise T5440 Server Service Manual • June 2011
Disabling Faulty Components Using Automatic
System Recovery
You can use the Automatic System Recovery (ASR) feature to configure the server to
automatically disable failed components until they can be replaced. The following
components are managed by the ASR feature:
■ UltraSPARC T2 Plus processor strands
■ Memory FB-DIMMs
■ I/O subsystem
The database that contains the list of disabled components is referred to as the ASR
blacklist (asr-db).
In most cases, POST automatically disables a faulty component. After the cause of the
fault is repaired (FRU replacement, loose connector reseated, and so on), you might
need to remove the component from the ASR blacklist.
Note – For instructions on enabling or disabling ASR, see the SPARC Enterprise
T5440 Server Administration Guide.
The ASR commands (TABLE: ASR Commands on page 56) enable you to view and
manually add or remove components (asrkeys) from the ASR blacklist. You run
these commands from the ILOM -> prompt.
Note – The asrkeys vary from system to system, depending on how many cores and
memory are present. Use the show components command to see the asrkeys on a
given system.
TABLE: ASR Commands
Command Description
show components Displays system components and their current state.
set asrkey component_state=
Enabled
Removes a component from the asr-db blacklist,
where asrkey is the component to enable.
set asrkey component_state=
Disabled
Adds a component to the asr-db blacklist, where
asrkey is the component to disable.