象reiserfs一样，XFS使用逻辑日志；即，它不象ext3那样将文字文件系统块记录到日志，而是使用一种高效的磁盘格式来记录元数据的变动。
Like ReiserFS, XFS USES a logical journal; that is, it does not journal literal filesystem blocks like ext3, and instead USES an efficient on-disk format to log metadata changes.
由于对磁盘表面的点的定位通常不准确，因此还使用扇区等格式，以帮助找到记录的位置。
Because of the disk surface point position is often inaccurate, it also USES sector and other formats to help find a record of the location.
磁盘文件是磁盘上具有相同格式的相关记录的集合，用一个惟一的标号来识别。
Disk file is an associated set of records of the same format on disk, identified by a unique label .
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