高速缓存中包含脏数据，但由于某些虚拟磁盘丢失或将转为脱机，因此无法将高速缓存的数据写入磁盘。
The cache contains dirty data, but some virtual disks are missing or will go offline, so the cached data can not be written to disk.
通过对常规内存、扩充内存、扩展内存、影子内存、高速缓存及虚拟内存的应用分析，对微型计算机的内存技术作了较系统的分析和总结。
By the applied analysis of conventional memory, expanded memory, extended memory, Rom shadow and cache, this thesis sums up the memory technology of PC systematically.
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