The /System/DCUs/ failover property is set to auto by default, so that Oracle ILOM automates failover when a failure occurs in a DCU. During service operations such as hot-plug removal and replacement, you can suspend automated failover and manually set the Active SP configuration as required before performing the operation.
Setting DCUs to manual failover prevents ILOM from performing system initiated failover specifically for DCUs. Automated failover of the Active SP is always in effect.
On SPARC M8 and M7 servers with two DCUs, the Active SP is also the controlling SP for DCU0, so DCU0 failover can still occur in the context of an Active SP failover.
You must have the admin role (a) to perform this task.
-> show /System/DCUs failover /System/DCUs Properties: failover = auto
-> set /System/DCUs failover=manual Set 'failover' to 'manual'
See SPARC M8 and SPARC M7 Servers Service Manual for instructions.
-> set /System/DCUs failover=auto Set 'failover' to 'auto'