The header contains general block information, such as the block address and the type of segment (for example, data or index).

块首部包涵了一般的块信息，这些信息包涵诸如块地址以及段的类型（比如，数据或者索引）等。

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In setting policy it is important first to segment your workforce to identify different types of users and determine the best ownership model by user type.

FORBES: Coping With Consumerization: Setting Sensible Policies