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rendy 2005-08-24
// an extra check here and don't alow disk images to be compressed/encrypted.
rendy 2005-08-24
因为它本身也使用文件来模拟的，如果打开缓存模式，就会陷入一个死循环里（它本身也要缓存）。
以下是原代码中的说明：
// The NT cache manager can deadlock if a filesystem that is using the cache
// manager is used in a virtual disk that stores its file on a filesystem
// that is also using the cache manager, this is why we open the file with
// FILE_NO_INTERMEDIATE_BUFFERING above, however if the file is compressed
// or encrypted NT will not honor this request and cache it anyway since it
// need to store the decompressed/unencrypted data somewhere, therefor we put
以下是原代码中的说明：
// The NT cache manager can deadlock if a filesystem that is using the cache
// manager is used in a virtual disk that stores its file on a filesystem
// that is also using the cache manager, this is why we open the file with
// FILE_NO_INTERMEDIATE_BUFFERING above, however if the file is compressed
// or encrypted NT will not honor this request and cache it anyway since it
// need to store the decompressed/unencrypted data somewhere, therefor we put