NTFS_STATISTICS_EX structure (winioctl.h)
Contains statistical information from the NTFS file system.Support for this structure started with Windows 10.
Syntax
typedef struct _NTFS_STATISTICS_EX {
DWORD LogFileFullExceptions;
DWORD OtherExceptions;
DWORDLONG MftReads;
DWORDLONG MftReadBytes;
DWORDLONG MftWrites;
DWORDLONG MftWriteBytes;
struct {
DWORD Write;
DWORD Create;
DWORD SetInfo;
DWORD Flush;
} MftWritesUserLevel;
DWORD MftWritesFlushForLogFileFull;
DWORD MftWritesLazyWriter;
DWORD MftWritesUserRequest;
DWORDLONG Mft2Writes;
DWORDLONG Mft2WriteBytes;
struct {
DWORD Write;
DWORD Create;
DWORD SetInfo;
DWORD Flush;
} Mft2WritesUserLevel;
DWORD Mft2WritesFlushForLogFileFull;
DWORD Mft2WritesLazyWriter;
DWORD Mft2WritesUserRequest;
DWORDLONG RootIndexReads;
DWORDLONG RootIndexReadBytes;
DWORDLONG RootIndexWrites;
DWORDLONG RootIndexWriteBytes;
DWORDLONG BitmapReads;
DWORDLONG BitmapReadBytes;
DWORDLONG BitmapWrites;
DWORDLONG BitmapWriteBytes;
DWORD BitmapWritesFlushForLogFileFull;
DWORD BitmapWritesLazyWriter;
DWORD BitmapWritesUserRequest;
struct {
DWORD Write;
DWORD Create;
DWORD SetInfo;
DWORD Flush;
} BitmapWritesUserLevel;
DWORDLONG MftBitmapReads;
DWORDLONG MftBitmapReadBytes;
DWORDLONG MftBitmapWrites;
DWORDLONG MftBitmapWriteBytes;
DWORD MftBitmapWritesFlushForLogFileFull;
DWORD MftBitmapWritesLazyWriter;
DWORD MftBitmapWritesUserRequest;
struct {
DWORD Write;
DWORD Create;
DWORD SetInfo;
DWORD Flush;
} MftBitmapWritesUserLevel;
DWORDLONG UserIndexReads;
DWORDLONG UserIndexReadBytes;
DWORDLONG UserIndexWrites;
DWORDLONG UserIndexWriteBytes;
DWORDLONG LogFileReads;
DWORDLONG LogFileReadBytes;
DWORDLONG LogFileWrites;
DWORDLONG LogFileWriteBytes;
struct {
DWORD Calls;
DWORD RunsReturned;
DWORD Hints;
DWORD HintsHonored;
DWORD Cache;
DWORD CacheMiss;
DWORDLONG Clusters;
DWORDLONG HintsClusters;
DWORDLONG CacheClusters;
DWORDLONG CacheMissClusters;
} Allocate;
DWORD DiskResourcesExhausted;
DWORDLONG VolumeTrimCount;
DWORDLONG VolumeTrimTime;
DWORDLONG VolumeTrimByteCount;
DWORDLONG FileLevelTrimCount;
DWORDLONG FileLevelTrimTime;
DWORDLONG FileLevelTrimByteCount;
DWORDLONG VolumeTrimSkippedCount;
DWORDLONG VolumeTrimSkippedByteCount;
DWORDLONG NtfsFillStatInfoFromMftRecordCalledCount;
DWORDLONG NtfsFillStatInfoFromMftRecordBailedBecauseOfAttributeListCount;
DWORDLONG NtfsFillStatInfoFromMftRecordBailedBecauseOfNonResReparsePointCount;
} NTFS_STATISTICS_EX, *PNTFS_STATISTICS_EX;
Members
LogFileFullExceptions
The number of exceptions generated due to the log file being full.
OtherExceptions
The number of other exceptions generated.
MftReads
The number of read operations on the master file table (MFT).
MftReadBytes
The number of bytes read from the MFT.
MftWrites
The number of write operations on the MFT.
MftWriteBytes
The number of bytes written to the MFT.
MftWritesUserLevel
MftWritesUserLevel.Write
The number of MFT writes due to a write operation.
MftWritesUserLevel.Create
The number of MFT writes due to a create operation.
MftWritesUserLevel.SetInfo
The number of MFT writes due to setting file information.
MftWritesUserLevel.Flush
The number of MFT writes due to a flush operation.
MftWritesFlushForLogFileFull
The number of flushes of the MFT performed because the log file was full.
MftWritesLazyWriter
The number of MFT write operations performed by the lazy writer thread.
MftWritesUserRequest
Reserved.
Mft2Writes
The number of write operations on the MFT mirror.
Mft2WriteBytes
The number of bytes written to the MFT mirror.
Mft2WritesUserLevel
Mft2WritesUserLevel.Write
The number of MFT mirror writes due to a write operation.
Mft2WritesUserLevel.Create
The number of MFT mirror writes due to a create operation.
Mft2WritesUserLevel.SetInfo
The number of MFT mirror writes due to setting file information.
Mft2WritesUserLevel.Flush
The number of MFT mirror writes due to a flush operation.
Mft2WritesFlushForLogFileFull
The number of flushes of the MFT mirror performed because the log file was full.
Mft2WritesLazyWriter
The number of MFT mirror write operations performed by the lazy writer thread.
Mft2WritesUserRequest
Reserved.
RootIndexReads
The number of read operations on the root index.
RootIndexReadBytes
The number of bytes read from the root index.
RootIndexWrites
The number of write operations on the root index.
RootIndexWriteBytes
The number of bytes written to the root index.
BitmapReads
The number of read operations on the cluster allocation bitmap.
BitmapReadBytes
The number of bytes read from the cluster allocation bitmap.
BitmapWrites
The number of write operations on the cluster allocation bitmap.
BitmapWriteBytes
The number of bytes written to the cluster allocation bitmap.
BitmapWritesFlushForLogFileFull
The number of flushes of the bitmap performed because the log file was full.
BitmapWritesLazyWriter
The number of bitmap write operations performed by the lazy writer thread.
BitmapWritesUserRequest
Reserved.
BitmapWritesUserLevel
BitmapWritesUserLevel.Write
The number of bitmap writes due to a write operation.
BitmapWritesUserLevel.Create
The number of bitmap writes due to a create operation.
BitmapWritesUserLevel.SetInfo
The number of bitmap writes due to setting file information.
BitmapWritesUserLevel.Flush
The number of bitmap writes due to a flush operation.
MftBitmapReads
The number of read operations on the MFT bitmap.
MftBitmapReadBytes
The number of bytes read from the MFT bitmap.
MftBitmapWrites
The number of write operations on the MFT bitmap.
MftBitmapWriteBytes
The number of bytes written to the MFT bitmap.
MftBitmapWritesFlushForLogFileFull
The number of flushes of the MFT bitmap performed because the log file was full.
MftBitmapWritesLazyWriter
The number of MFT bitmap write operations performed by the lazy writer thread.
MftBitmapWritesUserRequest
Reserved.
MftBitmapWritesUserLevel
MftBitmapWritesUserLevel.Write
The number of MFT bitmap writes due to a write operation.
MftBitmapWritesUserLevel.Create
The number of bitmap writes due to a create operation.
MftBitmapWritesUserLevel.SetInfo
The number of bitmap writes due to setting file information.
MftBitmapWritesUserLevel.Flush
The number of bitmap writes due to a flush operation.
UserIndexReads
The number of read operations on the user index.
UserIndexReadBytes
The number of bytes read from the user index.
UserIndexWrites
The number of write operations on the user index.
UserIndexWriteBytes
The number of bytes written to the user index.
LogFileReads
The number of read operations on the log file.
LogFileReadBytes
The number of bytes read from the log file.
LogFileWrites
The number of write operations on the log file.
LogFileWriteBytes
The number of bytes written to the log file.
Allocate
Allocate.Calls
The number of individual calls to allocate clusters.
Allocate.RunsReturned
The number of runs used to satisfy all the requests.
Allocate.Hints
The number of times a hint was specified.
Allocate.HintsHonored
The number of times the hint was useful.
Allocate.Cache
The number of times the cache was useful other than the hint.
Allocate.CacheMiss
The number of times the cache was not useful.
Allocate.Clusters
The number of clusters allocated.
Allocate.HintsClusters
The number of clusters allocated through the hint.
Allocate.CacheClusters
The number of clusters allocated through the cache other than the hint.
Allocate.CacheMissClusters
The number of clusters allocated without the cache.
DiskResourcesExhausted
The number of failed attempts made to acquire a slab of storage for use on the current thinly provisioned volume.
VolumeTrimCount
The number of volume level trim operations issued.
VolumeTrimTime
The total time elapsed during all volume level trim operations. This value, divided by the frequency value from QueryPerformanceFrequency or KeQueryPerformanceCounter, will give the time in seconds.
VolumeTrimByteCount
The total number of bytes issued by all volume level trim operations.
FileLevelTrimCount
The number of file level trim operations issued.
FileLevelTrimTime
The total time elapsed during all file level trim operations. This value, divided by the frequency value from QueryPerformanceFrequency or KeQueryPerformanceCounter, will give the time in seconds.
FileLevelTrimByteCount
The total number of bytes issued by all file level trim operations.
VolumeTrimSkippedCount
The number of times a volume level trim operation was aborted before being sent down through the storage stack.
VolumeTrimSkippedByteCount
The number of bytes that were not sent through a volume level trim operation because they were skipped.
NtfsFillStatInfoFromMftRecordCalledCount
NtfsFillStatInfoFromMftRecordBailedBecauseOfAttributeListCount
NtfsFillStatInfoFromMftRecordBailedBecauseOfNonResReparsePointCount
Remarks
The MFT, MFT mirror, root index, user index, bitmap, and MFT bitmap are counted as metadata files. The log file is not counted as a metadata file.
The number of read and write operations measured is the number of paging operations.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 10 [desktop apps only] |
| Minimum supported server | Windows Server 2016 [desktop apps only] |
| Header | winioctl.h (include Windows.h) |