Brocade OS Command Reference Manual Supporting Fabric OS v6.0.0 (53-1000599-01, October 2007)

264 Fabric OS Command Reference

53-1000599-01

historyMode

Displays or sets the mode of the field replaceable unit (FRU) history log.

Synopsis historymode [ rot | fi ]

Description Use this command to display or set the mode of the history buffer, which records the insertion and

removal of FRUs on a switch or chassis.

This command supports two modes of handling new log entries once the history buffer has

reached its maximum size:

Rotating mode Any new entry exceeding the maximum buffer size will overwrite the oldest

entry in the log.

First-in mode Any new entry exceeding the maximum buffer size will be discarded. The

original entries in the buffer will be preserved.

The size of the history buffer depends on the HW platform: The Brocade 48000 Director supports

100 history log entries. The DCX Data Center Backbone Director supports a maximum log size of

50 entries. Since the WWNs are completely separate FRUs in the DCX, they will have redundant

data in these units. All other platforms containing FRUs support 28 history log entries.

Operands When invoked without operands the command displays the mode of the history log.

Setting the mode of the history log requires root permission. The following operands are supported

when the command is executed as root:

rot Set history log to rotating mode.

fi Set history log to first-in mode.

When setting the history mode, the user will be prompted to clear the log.

Examples To display the mode of the history log:

switch:admin> historymode

History Mode is: Rotating.