A method and system are disclosed to enable and control over-subscription
in a blade/chassis system and to provide the capability to recover in the
event of the loss of a redundant power supply. An over-subscription
policy is determined by a system administrator and is set in the chassis
management module. Information regarding the maximum power allocation
needed for each blade being powered by the power supply system is
identified by the blade and stored in its VPD or otherwise made available
to the chassis management module. The management module of the chassis in
which the blades and power supplies are located uses this information to
manage the subscription of blades and the over-subscription of blades
when appropriate. If throttling is required, the system also allows a
predetermined blade priority to be used to identify which blades will be
reduced in power.