Edit

FILE_PROVIDER_EXTERNAL_INFO_V0 structure (ntifs.h)

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This structure may be altered or unavailable. Instead, use FILE_PROVIDER_EXTERNAL_INFO_V1.

Syntax

typedef struct _FILE_PROVIDER_EXTERNAL_INFO_V0 {
  ULONG Version;
  ULONG Algorithm;
} FILE_PROVIDER_EXTERNAL_INFO_V0, *PFILE_PROVIDER_EXTERNAL_INFO_V0;

Members

Version

The version of the provider to use. Specify FILE_PROVIDER_CURRENT_VERSION.

Algorithm

Specifies the compression algorithm that is used to compress this file. Currently defined algorithms are:

Algorithm Description
FILE_PROVIDER_COMPRESSION_XPRESS4K The data for the file should be compressed in 4kb chunks with the XPress algorithm. This algorithm is designed to be computationally lightweight, and provides for rapid access to data.
FILE_PROVIDER_COMPRESSION_LZX The data for the file should be compressed in 32kb chunks with the LZX algorithm. This algorithm is designed to be highly compact, and provides for small footprint for infrequently accessed data.
FILE_PROVIDER_COMPRESSION_XPRESS8K The data for the file should be compressed in 8kb chunks with the XPress algorithm.
FILE_PROVIDER_COMPRESSION_XPRESS16K The data for the file should be compressed in 16kb chunks with the XPress algorithm.

Requirements

Requirement Value
Minimum supported client Windows 10
Header ntifs.h (include Windows.h, WinIoCtl.h, Ntifs.h, Windows.h, WinIoCtl.h, Ntifs.h)

See also

FILE_PROVIDER_EXTERNAL_INFO_V1