Brocade Fabric OS Command Reference Manual (53-1000240-01, November 2006)

2-538 Fabric OS Command Reference Manual
Publication Number: 53-1000240-01
powerOffListSet
2
Note: Enter commands in lowercase only; mixed case is for readability.
powerOffListSet
Sets slot power-off list order.
Synopsis powerofflistset
Description Use this command to change the order in which slots are powered off. This command displays the current
order and then prompts you to indicate the new order.
Whenever a power supply goes out of service or a field-replaceable unit (FRU) is inserted, the system
available power is compared to the system required power to determine if there is enough power to
operate. If there is less power available than the demand, the power-off list is processed until there is
enough power for the system to operate.
If the system abruptly goes from a state in which there is enough power to run all inserted and powered
on FRUs to a state in which there is not enough power to run everything, no processing of the power-off
list can be done. This is because the lack of power causes the CP boards’ processors to cease execution
of the firmware. In this situation, all operation of the system terminates immediately: for instance, if two
power supplies already have been removed from a SilkWorm director, and than a third one is removed
so that suddenly only one power supply is available to power a fully loaded system. However, if the
system is running on two power supplies (this is not recommended) and one goes into a predicted fail
state (in which the power supply is still supplying power), the power-off list is processed as described.
The power-off list only affects the order in which slots are powered off. On power up or when an
additional power supply is added, slots are processed to verify that they can be powered up. This
processing always starts at slot 1 and proceeds to the last slot in the chassis. Also, other FRUs in the
chassis might use significant power yet the FRUs cannot be powered off by software. For example, a
missing blower FRU might change the power computation enough to affect how many slot blades can be
powered up.
The format of the display varies, depending on the switch model and the number of slots present.
N
ote
The execution of this command is subject to Admin Domain restrictions that may be in place.
Operands none