Set DCU Failover Control for System
On SPARC servers, such as M8 series servers, you can set system-wide DCU
failover control as of Oracle ILOM firmware version 4.0.1.x and later. By
default, the system DCU failover control is automated by Oracle ILOM.
However, during service operations such as hot-plug insertion or removal it
might be helpful to suspend the automated failover control by Oracle ILOM.
For these instances, the DCUs Failover control can be set to Manual. For
further details, follow these instructions:
-
To set DCU system failover control, peform one of the
following:
-
Web: From the active SP web interface, click ILOM
Administration > Configuration Management > DCUs.
In the Failover box, select Auto or Manual.
For a description of each option, see DCU System Failover Properties.
- OR -
-
CLI: From the active SP CLI, type:
set /System/DCUs failover=
Auto|Manual
For a description of each option, see DCU System Failover Properties.
DCU Status States
For a list of possible health status states for logical DCU-host configurations, see the
following table.
Table 81 DCU Health Status Definitions
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OK
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The DCU assignment is in good working order.
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Unknown
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Oracle ILOM is unable to show the DCU health status, assignments, or sub-component
details.
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Service Required
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Oracle ILOM has detected a problem on a chassis component, and a service action is required to
resolve the issue. See the Open Problems page and view the knowledge base URL for resolution.
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Warning
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Oracle ILOM has detected a minor problem with the DCU assignment. Despite the warning message,
the DCU assignment is functioning properly. The informational message can safely be ignored.
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DCU System Failover Properties
Table 82 DCU Auto and Manual Failover Properties
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Auto
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Automated failover by Oracle ILOM for DCUs is
enabled.
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Manual
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Automated failover by Oracle ILOM for DCUs is disabled.
Note: When the Failover
property is set to Manual, Oracle ILOM is prevented from
performing system initiated DCUs failover. Automated
failover of the Active-SP is always enabled. For M7-4 and
M8-4 systems, the Active-SP is also the controlling SP for
DCU0, therefore, DCU0 failover might still occur in the
context of an Active-SP failover (typically initiated by
component health).
When Failover is set to Manual, Oracle ILOM will
automatically log the following event in cases when a DCU
failover attempt would have been made if the Failover
property was set to Auto:
Failover on /System/DCUs/DCU_x was not
initiated by system due to auto-failover disabled by
user.
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