"磁盘高速缓存" can be translated into English as "disk cache" or "disk buffer cache".
"Disk cache" is a more general and commonly used term, referring to a portion of memory used to store frequently accessed data from the disk to speed up data retrieval.
"Disk buffer cache" is a slightly more specific term, emphasizing the buffering function of the cache in relation to disk I/O operations.
In most contexts, "disk cache" would be sufficient and appropriate.