当我加载nxos.7.0.3.I2.2d.bin软件时，风扇在以下速度下运行非常安静
switch# sh environment fan detail
Fan:
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Fan Model Hw Direction Status
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Fan1(sys_fan1) N9K-C9300-FAN2 -- front-to-back Ok
Fan2(sys_fan2) N9K-C9300-FAN2 -- front-to-back Ok
Fan3(sys_fan3) N9K-C9300-FAN2 -- front-to-back Ok
Fan_in_PS1 -- -- front-to-back Ok
Fan_in_PS2 -- -- front-to-back None
Fan Zone Speed: Zone 1: 0x33
Fan Air Filter : NotSupported
Fan:
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Fan Tray Fan Fan Direction Speed(%) Speed(RPM)
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Fan1(sys_fan1) fan1 front-to-back 37 6136
Fan1(sys_fan1) fan2 front-to-back 37 4895
Fan2(sys_fan2) fan1 front-to-back 35 5825
Fan2(sys_fan2) fan2 front-to-back 36 4753
Fan3(sys_fan3) fan1 front-to-back 36 5973
Fan3(sys_fan3) fan2 front-to-back 37 4838
但是当我用最新的升级它时，nxos.7.0.3.I4.7.bin它运行得很快。为什么？
switch# sh environment fan detail
Fan:
---------------------------------------------------------------------------
Fan Model Hw Direction Status
---------------------------------------------------------------------------
Fan1(sys_fan1) N9K-C9300-FAN2 -- front-to-back Ok
Fan2(sys_fan2) N9K-C9300-FAN2 -- front-to-back Ok
Fan3(sys_fan3) N9K-C9300-FAN2 -- front-to-back Ok
Fan_in_PS1 -- -- front-to-back Ok
Fan_in_PS2 -- -- front-to-back Shutdown
Fan Zone Speed: Zone 1: 0x80
Fan Air Filter : NotSupported
Fan:
------------------------------------------------------------------
Fan Tray Fan Fan Direction Speed(%) Speed(RPM)
------------------------------------------------------------------
Fan1(sys_fan1) fan1 front-to-back 62 10325
Fan1(sys_fan1) fan2 front-to-back 63 8256
Fan2(sys_fan2) fan1 front-to-back 59 9872
Fan2(sys_fan2) fan2 front-to-back 62 8071
Fan3(sys_fan3) fan1 front-to-back 61 10169
Fan3(sys_fan3) fan2 front-to-back 62 8071
