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MPIO_GET_DESCRIPTOR structure (mpiodisk.h)

  • Article

The MPIO_GET_DESCRIPTOR structure is used to query for LUN instances that correspond to various paths. This structure retrieves device-path pairing information about a multi-path disk. The target of the request must be a pseudo-LUN that is addressed by using its WMI instance name.

Syntax

typedef struct _MPIO_GET_DESCRIPTOR {
  ULONG           NumberPdos;
  WCHAR           DeviceName[63 + 1];
  PDO_INFORMATION PdoInformation[1];
} MPIO_GET_DESCRIPTOR, *PMPIO_GET_DESCRIPTOR;

Members

NumberPdos

An unsigned 32-bitfield that returns the number of real instances of the pseudo-LUN through its various paths.

DeviceName[63 + 1]

A string field of maximum-length 63 characters that returns the device name that is created by MPIO for the LUN.

PdoInformation[1]

A field that returns an array of PDO_INFORMATION structures, where the number of elements is given by NumberPdos, and each element represents an instance of the LUN that is exposed through a particular path.

Requirements

Requirement Value
Header mpiodisk.h (include Mpiowmi.h)