MPIO_DSM_Path_V2 structure (mpiodisk.h)

The MPIO_DSM_Path_V2 structure is used to represent the DSM's definition of a path. It is a superset of the previously existing MPIO_DSM_Path class.

Syntax

typedef struct _MPIO_DSM_Path_V2 {
  ULONGLONG DsmPathId;
  ULONGLONG Reserved;
  ULONG     PathWeight;
  ULONG     PrimaryPath;
  ULONG     OptimizedPath;
  ULONG     PreferredPath;
  ULONG     FailedPath;
  ULONG     TargetPortGroup_State;
  ULONG     ALUASupport;
  UCHAR     SymmetricLUA;
  UCHAR     TargetPortGroup_Preferred;
  USHORT    TargetPortGroup_Identifier;
  ULONG     TargetPort_Identifier;
  ULONG     Reserved32;
  ULONGLONG Reserved64;
} MPIO_DSM_Path_V2, *PMPIO_DSM_Path_V2;

Members

DsmPathId

An unsigned 64-bitfield that is used as a unique identifier to distinguish paths known to the DSM.

Reserved

Should be zero.

PathWeight

An unsigned 32-bitfield that holds the weight associated with the given path.

PrimaryPath

An unsigned 32-bitfield that is used as a flag to indicate the path state when accessing a particular LUN.

OptimizedPath

An unsigned 32-bitfield that is used in conjunction with PrimaryPath to indicate the path state for accessing a LUN.

PreferredPath

An unsigned 32-bitfield that is used as a flag to indicate whether this is the preferred path for accessing the LUN.

FailedPath

A 32-bit unsigned field that is used as a flag to indicate if the path has failed.

TargetPortGroup_State

An unsigned 32-bitfield that is used to indicate the access state of the target port group to which this instance of the LUN belongs.

ALUASupport

An unsigned 32-bitfield that returns the Asymmetrical Logical Unit Access (ALUA) state transition support that is indicated by the LUN.

SymmetricLUA

An unsigned 8-bitfield that is used as a flag to indicate to the application if logical unit access is symmetric.

TargetPortGroup_Preferred

An unsigned 8-bitfield that is used as a flag. This field indicates if the LUN's target port group that corresponds to this path is preferred for the LUN access.

TargetPortGroup_Identifier

An unsigned 16-bitfield that contains the identifier of the LUN's target port group that corresponds to this path.

TargetPort_Identifier

An unsigned 32-bitfield that contains the identifier of the target port that corresponds to this path through which the LUN has been exposed.

Reserved32

Should be zero.

Reserved64

Should be zero.

Requirements