The full disk seek time is 7.4 milliseconds for reads and 7.9 milliseconds for writes.
读操作的完整硬盘寻道时间是 7.4 毫秒，而写操作是 7.9 毫秒。
Because the pages are not read sequentially from the disk, both seek and rotational delays occur before each page can be read.
因为不是从磁盘连续读取页面的，所以在读取每个页面之前，都需要进行查找并存在循环延迟。
The upside, as I mentioned, is that it's log structured, so writes are sequential in nature (minimizing seek behavior of the physical disk) and thus very fast.
前面已经提到，它的优点在于它是日志结构的，采用连续写的方式(减少物理磁盘的查找行为)，因此非常快。
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