如果修改了该环境或更改了首选项，那么可能不会完全象如下所述那样工作。
If you have modified the environment or changed preferences, they may not work precisely as described below.
按如下所示修改Toolbar visibility options区段中的选项。
Change the options in the Toolbar visibility options section as follows.
V 5 R 4中首次提供的SSD支持允许用户在创建时指定媒介首选项，或稍后使用如下所示的命令进行修改。
The initial support for SSDs in V5R4 allowed users to specify a media preference at creation or altered later with a change command as shown in the following examples.
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