VDS_LUN_FLAG enumeration (vds.h)

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[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]

Defines the set of valid flags for a LUN object.

Syntax

typedef enum _VDS_LUN_FLAG {
  VDS_LF_LBN_REMAP_ENABLED = 0x1,
  VDS_LF_READ_BACK_VERIFY_ENABLED = 0x2,
  VDS_LF_WRITE_THROUGH_CACHING_ENABLED = 0x4,
  VDS_LF_HARDWARE_CHECKSUM_ENABLED = 0x8,
  VDS_LF_READ_CACHE_ENABLED = 0x10,
  VDS_LF_WRITE_CACHE_ENABLED = 0x20,
  VDS_LF_MEDIA_SCAN_ENABLED = 0x40,
  VDS_LF_CONSISTENCY_CHECK_ENABLED = 0x80,
  VDS_LF_SNAPSHOT = 0x100
} VDS_LUN_FLAG, *PVDS_LUN_FLAG;

Constants

 
VDS_LF_LBN_REMAP_ENABLED
Value: 0x1
The provider remaps LUN extents to drive extents automatically.
VDS_LF_READ_BACK_VERIFY_ENABLED
Value: 0x2
The provider verifies writes by readback.
VDS_LF_WRITE_THROUGH_CACHING_ENABLED
Value: 0x4
The provider enables write-through caching on the LUN.
VDS_LF_HARDWARE_CHECKSUM_ENABLED
Value: 0x8
The provider verifies the integrity of the read and write data using a checksum.
VDS_LF_READ_CACHE_ENABLED
Value: 0x10
Read caching is enabled on the LUN.

Windows Server 2008, Windows Vista and Windows Server 2003:  This value is not supported.
VDS_LF_WRITE_CACHE_ENABLED
Value: 0x20
Write caching is enabled on the LUN.

Windows Server 2008, Windows Vista and Windows Server 2003:  This value is not supported.
VDS_LF_MEDIA_SCAN_ENABLED
Value: 0x40
Media scanning is enabled on the LUN.

Windows Server 2008, Windows Vista and Windows Server 2003:  This value is not supported.
VDS_LF_CONSISTENCY_CHECK_ENABLED
Value: 0x80
Consistency checking is enabled on the LUN.

Windows Server 2008, Windows Vista and Windows Server 2003:  This value is not supported.
VDS_LF_SNAPSHOT
Value: 0x100
The LUN is a volume shadow copy LUN.

Windows Server 2008, Windows Vista and Windows Server 2003:  This value is not supported.

Remarks

This enumeration provides the values for the ulFlags member of the VDS_LUN_PROP structure and provides the value for the VDS_LPF_LBN_REMAP_ENABLED enumerator in the VDS_LUN_PLEX_FLAG enumeration.

Note  Additional constants might be added to the VDS_LUN_FLAG enumeration in future Windows versions. For this reason, your application must be designed to gracefully handle an unrecognized VDS_LUN_FLAG enumeration constant.
 

Requirements

Requirement Value
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Header vds.h

See also

VDS Enumerations

VDS_LUN_PLEX_FLAG

VDS_LUN_PROP