STORAGE_MINIPORT_DESCRIPTOR - NtDoc

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

typedef struct _STORAGE_MINIPORT_DESCRIPTOR {
  ULONG                 Version;
  ULONG                 Size;
  STORAGE_PORT_CODE_SET Portdriver;
  BOOLEAN               LUNResetSupported;
  BOOLEAN               TargetResetSupported;
  USHORT                IoTimeoutValue;
  BOOLEAN               ExtraIoInfoSupported;
  union {
    struct {
      UCHAR LogicalPoFxForDisk : 1;
      UCHAR ForwardIo : 1;
      UCHAR Reserved : 6;
    } DUMMYSTRUCTNAME;
    UCHAR AsUCHAR;
  } Flags;
#if ...
  UCHAR                 Reserved0[2];
#else
  UCHAR                 Reserved0[3];
#endif
  ULONG                 Reserved1;
} STORAGE_MINIPORT_DESCRIPTOR, *PSTORAGE_MINIPORT_DESCRIPTOR;

View the official Windows Driver Kit DDI reference
// winioctl.h

typedef struct _STORAGE_MINIPORT_DESCRIPTOR {
  DWORD                 Version;
  DWORD                 Size;
  STORAGE_PORT_CODE_SET Portdriver;
  BOOLEAN               LUNResetSupported;
  BOOLEAN               TargetResetSupported;
  WORD                  IoTimeoutValue;
  BOOLEAN               ExtraIoInfoSupported;
  union {
    struct {
      BYTE LogicalPoFxForDisk : 1;
      BYTE ForwardIo : 1;
      BYTE Reserved : 6;
    } DUMMYSTRUCTNAME;
    BYTE AsBYTE;
  } Flags;
#if ...
  BYTE                  Reserved0[2];
#else
  BYTE                  Reserved0[3];
#endif
  DWORD                 Reserved1;
} STORAGE_MINIPORT_DESCRIPTOR, *PSTORAGE_MINIPORT_DESCRIPTOR;

View the official Win32 API reference

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Windows Driver Kit DDI reference (ns-ntddstor-_storage_miniport_descriptor)

STORAGE_MINIPORT_DESCRIPTOR structure

Description

Reserved for system use.

Members

Version

Contains the size of this structure, in bytes. The value of this member will change as members are added to the structure.

Size

Specifies the total size of the data returned, in bytes. This may include data that follows this structure.

Portdriver

Type of port driver as enumerated by the STORAGE_PORT_CODE_SET enumeration.

LUNResetSupported

Indicates whether a LUN reset is supported.

TargetResetSupported

Indicates whether a target reset is supported.

IoTimeoutValue

The timeout value for the device, in milliseconds (ms). Introduced in Windows 8.

ExtraIoInfoSupported

Indicates whether extra I/O info is supported. Introduced in Windows 8.1

Flags

Flags.DUMMYSTRUCTNAME

Flags.DUMMYSTRUCTNAME.LogicalPoFxForDisk

Flags.DUMMYSTRUCTNAME.ForwardIo

Reserved for internal use. Do not use.

Flags.DUMMYSTRUCTNAME.Reserved

Reserved for future use.

Flags.AsUCHAR

Reserved0[2]

Reserved for future use.

Reserved0[3]

Reserved for future use.

Reserved1

Reserved for future use.

View the official Windows Driver Kit DDI reference

Edit description on GitHub

Win32 API reference (ns-winioctl-storage_miniport_descriptor)

STORAGE_MINIPORT_DESCRIPTOR structure

Description

Reserved for system use.

Members

Version

Contains the size of this structure, in bytes. The value of this member will change as members are added to the structure.

Size

Specifies the total size of the data returned, in bytes. This may include data that follows this structure.

Portdriver

Type of port driver as enumerated by the STORAGE_PORT_CODE_SET enumeration.

Value Meaning
StoragePortCodeSetReserved

0		 Indicates an unknown storage adapter driver type.
StoragePortCodeSetStorport

1		 Storage adapter driver is a Storport-miniport driver.
StoragePortCodeSetSCSIport

2		 Storage adapter driver is a SCSI Port-miniport driver.

LUNResetSupported

Indicates whether a LUN reset is supported.

TargetResetSupported

Indicates whether a target reset is supported.

IoTimeoutValue

ExtraIoInfoSupported

Reserved0

Reserved1

See also

Disk Management Structures

STORAGE_PORT_CODE_SET

View the official Win32 API reference

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