// ntdddisk.h

typedef enum {
  EqualPriority,
  KeepPrefetchedData,
  KeepReadData
} DISK_CACHE_RETENTION_PRIORITY;
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Windows Driver Kit DDI reference (ne-ntdddisk-disk_cache_retention_priority)

DISK_CACHE_RETENTION_PRIORITY enumeration

Description

The DISK_CACHE_RETENTION_PRIORITY enumeration is used in conjunction with the IOCTL_DISK_GET_CACHE_INFORMATION request and the structure DISK_CACHE_INFORMATION to indicate which kinds data are to be held in the cache on a preferential basis.

Constants

`EqualPriority`

Indicates that no data is held in the cache on a preferential basis. All types of data have equal access to cache memory.

`KeepPrefetchedData`

Indicates that a preference is to be given to prefetched data.

`KeepReadData`

Indicates that a preference is to be given to data cached from a READ operation.

DISK_CACHE_RETENTION_PRIORITY - NtDoc