H3C交换机风扇，Fan 1 airflow direction is not preferred on slot 1, please check it

H3C 6860 54HT

display fan 查看风扇转向 出现FanDirectionFault 这就出错了
fan prefer-direction slot 1 port-to-power 这个命令可以改变风扇的方向
如果是交换机的member 号已经改变了，就直接在系统窗口
参数 n是member号，

[H3C]fan prefer-direction slot n port-to-power

再次 display fan 查看风扇转向 出现Normal

system
system-view
System View: return to User View with Ctrl+Z.
[H3C]line aux 0
[H3C-line-aux0]%Jan  1 00:03:11:704 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 1 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:03:11:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 2 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:03:11:706 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 3 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:03:11:707 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 4 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:03:11:707 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 5 airflow direction is not preferred on slot 1, please check it.

[H3C-line-aux0]
[H3C-line-aux0]
[H3C-line-aux0]%Jan  1 00:04:31:704 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 1 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:04:31:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 2 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:04:31:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 3 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:04:31:706 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 4 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:04:31:707 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 5 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:05:51:704 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 1 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:05:51:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 2 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:05:51:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 3 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:05:51:706 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 4 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:05:51:707 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 5 airflow direction is not preferred on slot 1, please check it.

[H3C-line-aux0]
[H3C-line-aux0]
[H3C-line-aux0]display fan
 Slot 1:
 Fan 1:
 State    : FanDirectionFault
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Power-to-port
 Fan 2:
 State    : FanDirectionFault
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Power-to-port
 Fan 3:
 State    : FanDirectionFault
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Power-to-port
 Fan 4:
 State    : FanDirectionFault
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Power-to-port
 Fan 5:
 State    : FanDirectionFault
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Power-to-port


---- More ----%Jan  1 00:07:11:704 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 1 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:07:11:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 2 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:07:11:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 3 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:07:11:706 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 4 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:07:11:707 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 5 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:08:31:704 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 1 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:08:31:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 2 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:08:31:705 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 3 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:08:31:706 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 4 airflow direction is not preferred on slot 1, please check it.
%Jan  1 00:08:31:707 2011 H3C DEV/1/FAN_DIRECTION_NOT_PREFERRED: Fan 5 airflow direction is not preferred on slot 1, please check it.
[H3C-line-aux0]fan prefer-direction slot 1 port-to-power
[H3C]%Jan  1 00:09:38:104 2011 H3C DEV/5/FAN_RECOVERED: Fan 1 recovered.
%Jan  1 00:09:38:105 2011 H3C DEV/5/FAN_RECOVERED: Fan 2 recovered.
%Jan  1 00:09:38:106 2011 H3C DEV/5/FAN_RECOVERED: Fan 3 recovered.
%Jan  1 00:09:38:107 2011 H3C DEV/5/FAN_RECOVERED: Fan 4 recovered.
%Jan  1 00:09:38:109 2011 H3C DEV/5/FAN_RECOVERED: Fan 5 recovered.

[H3C]dis fan
 Slot 1:
 Fan 1:
 State    : Normal
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Port-to-power
 Fan 2:
 State    : Normal
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Port-to-power
 Fan 3:
 State    : Normal
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Port-to-power
 Fan 4:
 State    : Normal
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Port-to-power
 Fan 5:
 State    : Normal
 Airflow Direction: Port-to-power
 Prefer Airflow Direction: Port-to-power