Sun Fire[TM] 12K/15K/20K/25K: DR not possible when CSB is blacklisted and domain configured with both Centreplane halves active
Last updated on JANUARY 29, 2018
Applies to:Sun Fire 12K Server - Version All Versions and later
Sun Fire 15K Server - Version All Versions and later
Sun Fire E20K Server - Version All Versions and later
Sun Fire E25K Server - Version All Versions and later
***Checked for relevance on 17-Jan-2014***
It has been observed that when a CSB (Centreplane Support Board) loses one of it's redundant power supplies, attempting to DR (Dynamic Reconfigure) in a system board will fail.
This is due to the design of the hpost process and the fact that to DR in a system board, we attempt to set the board to use the same Address, Response and Data bus configuration.
As we cannot achieve this configuration, hpost FAILs out the SB (System board).
This is in fact, not a bug. By design, we do not change current bus configuration as part of an hpost (Host Power On Self Test) for a DR.
hpost can indeed make bus configuration decisions when the domain is being started up from cold, just not during a DR. The method to change the bus configuration on a running domain is 'setbus'.
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