MPIO_DISK_HEALTH_CLASS - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// mpiowmi.h

typedef struct _MPIO_DISK_HEALTH_CLASS {
  WCHAR     Name[63 + 1];
  ULONGLONG NumberReads;
  ULONGLONG NumberWrites;
  ULONGLONG NumberBytesRead;
  ULONGLONG NumberBytesWritten;
  ULONGLONG NumberRetries;
  ULONGLONG NumberIoErrors;
  ULONGLONG CreateTime;
  ULONGLONG PathFailures;
  ULONGLONG FailTime;
  BOOLEAN   DeviceOffline;
  UCHAR     NumberReadsWrap;
  UCHAR     NumberWritesWrap;
  UCHAR     NumberBytesReadWrap;
  UCHAR     NumberBytesWrittenWrap;
  UCHAR     Pad[3];
} MPIO_DISK_HEALTH_CLASS, *PMPIO_DISK_HEALTH_CLASS;
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (ns-mpiowmi-_mpio_disk_health_class)

_MPIO_DISK_HEALTH_CLASS structure

Description

The MPIO_DISK_HEALTH_CLASS structure contains the health information for a multi-path disk.

Members

Name

The name of this multi-path disk.

NumberReads

An unsigned 64-bitfield that specifies the number of read requests that are serviced by this multi-path disk.

NumberWrites

An unsigned 64-bitfield that specifies the number of write requests that are serviced by this multi-path disk.

NumberBytesRead

An unsigned 64-bitfield that specifies the total number of bytes that are read from this multi-path disk.

NumberBytesWritten

An unsigned 64-bitfield that specifies the total number of bytes that are written to this multi-path disk.

NumberRetries

An unsigned 64-bitfield that specifies the total number of retries for this multi-path disk.

NumberIoErrors

An unsigned 64-bitfield that specifies the total number of I/O errors that are encountered by this multi-path disk.

CreateTime

A 64-bit integer that specifies the system time when the health packet was created for this multi-path disk.

PathFailures

A 64-bit integer that specifies the total number of path failures for this multi-path disk.

FailTime

A 64-bit integer that specifies the system time when this multi-path disk went offline or failed.

DeviceOffline

A Boolean field that indicates whether the multi-path disk is offline or has failed.

NumberReadsWrap

An unsigned character field that specifies the total number of times that the NumberReads parameter has rolled around to zero.

NumberWritesWrap

An unsigned character field that specifies the total number of times the NumberWrites parameter has rolled around to zero.

NumberBytesReadWrap

An unsigned character field that specifies the total number of times that the NumberBytesRead parameter has rolled around to zero.

NumberBytesWrittenWrap

An unsigned character field that specifies the total number of times that the NumberBytesWritten parameter has rolled around to zero.

Pad

Should be zero.

View the official Windows Driver Kit DDI reference

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