AIX 设备管理

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设备的状态
<1>Undefined未定义状态
如果设备处于此状态，则系统没有该设备的任何信息。

<2>Defined已定义状态
处于此状态，说明系统已经存有该Aix操作系统设备的全部信息(ODM)，并已经给设备分配好逻辑设备名和端口，但当前设备还不能被使用。

<3>Available可用状态
处于此状态的Aix操作系统设备能被正常使用。

设备可以在这三种状态之间进行转换，可通过命令mkdev -dl和 rmdev -dl来进行，或通过smit dev来实现。 
例如： 
(1) mkdev -l rmt0 
rmt0 Available

(2) rmdev -l rmt0 
rmt0 Defined

(3) rmdev -dl rmt0 
rmt0 deleted

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