Brocade 7800 Extension Switch Hardware Reference Manual - Manual (Page 39)

The FRUs are cross connected so that if one power supply fails the fans will continue to run on power
from the other power supply.
Any of the following methods can be used to determine whether a FRU requires replacing:
• Check the status LED next to the On/Off switch (see LEDs on the nonport side of the Brocade 7800
on page 37).
• In DCFM, double click the 7800 switch icon to open Web Tools, then click the Power Status icon.
• Enter the psShow command at the command prompt to display power supply status.
• In DCFM, double click the 7800 switch icon to open Web Tools, then click the Fan Status icon.
• Enter the fanShow command at the command prompt.
See the Combined Power Supply and Fan Assembly Replacement Procedure for information on how to
change the FRU.
Powering off the switch
Perform the following steps to power off the switch.
1. Run the sysShutdown command.
This command not only shuts down the key processors but also powers off the switch and all LEDs
will go dark.
2. Set each AC power switch to "0".
Powering off the switch
Brocade 7800 Extension Switch Hardware Reference Manual 39
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