Edit

Share via

VDS_SUB_SYSTEM_FLAG enumeration (vdshwprv.h)

  • Article

[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]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

Syntax

typedef enum _VDS_SUB_SYSTEM_FLAG {
  VDS_SF_LUN_MASKING_CAPABLE = 0x1,
  VDS_SF_LUN_PLEXING_CAPABLE = 0x2,
  VDS_SF_LUN_REMAPPING_CAPABLE = 0x4,
  VDS_SF_DRIVE_EXTENT_CAPABLE = 0x8,
  VDS_SF_HARDWARE_CHECKSUM_CAPABLE = 0x10,
  VDS_SF_RADIUS_CAPABLE = 0x20,
  VDS_SF_READ_BACK_VERIFY_CAPABLE = 0x40,
  VDS_SF_WRITE_THROUGH_CACHING_CAPABLE = 0x80,
  VDS_SF_SUPPORTS_FAULT_TOLERANT_LUNS = 0x200,
  VDS_SF_SUPPORTS_NON_FAULT_TOLERANT_LUNS = 0x400,
  VDS_SF_SUPPORTS_SIMPLE_LUNS = 0x800,
  VDS_SF_SUPPORTS_SPAN_LUNS = 0x1000,
  VDS_SF_SUPPORTS_STRIPE_LUNS = 0x2000,
  VDS_SF_SUPPORTS_MIRROR_LUNS = 0x4000,
  VDS_SF_SUPPORTS_PARITY_LUNS = 0x8000,
  VDS_SF_SUPPORTS_AUTH_CHAP = 0x10000,
  VDS_SF_SUPPORTS_AUTH_MUTUAL_CHAP = 0x20000,
  VDS_SF_SUPPORTS_SIMPLE_TARGET_CONFIG = 0x40000,
  VDS_SF_SUPPORTS_LUN_NUMBER = 0x80000,
  VDS_SF_SUPPORTS_MIRRORED_CACHE = 0x100000,
  VDS_SF_READ_CACHING_CAPABLE = 0x200000,
  VDS_SF_WRITE_CACHING_CAPABLE = 0x400000,
  VDS_SF_MEDIA_SCAN_CAPABLE = 0x800000,
  VDS_SF_CONSISTENCY_CHECK_CAPABLE = 0x1000000
} VDS_SUB_SYSTEM_FLAG, *PVDS_SUB_SYSTEM_FLAG;

Constants

 
VDS_SF_LUN_MASKING_CAPABLE
Value: 0x1
The subsystem supports LUN masking. This flag applies only to external hardware
providers—internal hardware providers do not support LUN masking.
VDS_SF_LUN_PLEXING_CAPABLE
Value: 0x2
The provider supports LUNs with more than one plex.
VDS_SF_LUN_REMAPPING_CAPABLE
Value: 0x4
The provider supports automatic remapping of LUN extents to drive extents.
VDS_SF_DRIVE_EXTENT_CAPABLE
Value: 0x8
The provider supports the use of drive extents in LUN creation. If this flag is not set, the
provider uses only whole drives to create LUNs.
VDS_SF_HARDWARE_CHECKSUM_CAPABLE
Value: 0x10
The provider supports verifying the integrity of the read and write data using a checksum. If this
flag is not set, the provider does not support using a checksum.
VDS_SF_RADIUS_CAPABLE
Value: 0x20
The subsystem supports RADIUS.
VDS_SF_READ_BACK_VERIFY_CAPABLE
Value: 0x40
The subsystem supports read verification of data that has been written.
VDS_SF_WRITE_THROUGH_CACHING_CAPABLE
Value: 0x80
The subsystem supports write-through caching.
VDS_SF_SUPPORTS_FAULT_TOLERANT_LUNS
Value: 0x200
The subsystem supports creation of automagic fault tolerant LUNs.
VDS_SF_SUPPORTS_NON_FAULT_TOLERANT_LUNS
Value: 0x400
The subsystem supports creation of automagic non-fault tolerant LUNs.
VDS_SF_SUPPORTS_SIMPLE_LUNS
Value: 0x800
The subsystem supports creation of simple LUNs.
VDS_SF_SUPPORTS_SPAN_LUNS
Value: 0x1000
The subsystem supports creation of spanned LUNs.
VDS_SF_SUPPORTS_STRIPE_LUNS
Value: 0x2000
The subsystem supports creation of striped LUNs.
VDS_SF_SUPPORTS_MIRROR_LUNS
Value: 0x4000
The subsystem supports creation of mirrored LUNs.
VDS_SF_SUPPORTS_PARITY_LUNS
Value: 0x8000
The subsystem supports creation of striped with parity LUNs.
VDS_SF_SUPPORTS_AUTH_CHAP
Value: 0x10000
The subsystem supports one-way CHAP authentication.
VDS_SF_SUPPORTS_AUTH_MUTUAL_CHAP
Value: 0x20000
The subsystem supports mutual CHAP authentication.
VDS_SF_SUPPORTS_SIMPLE_TARGET_CONFIG
Value: 0x40000
The subsystem supports only simple target configurations and automatically assigns LUNs to targets during LUN
creation. Such a target must be configured with at least one associated portal in the target's portal group. The provider is responsible for correctly associating portals with the target. A VDS application should not assume that the subsystem has the ability to create or delete simple targets.
VDS_SF_SUPPORTS_LUN_NUMBER
Value: 0x80000
The subsystem supports LUN numbering. See the IVdsLunNumber::GetLunNumber method.

Windows Server 2008, Windows Vista and Windows Server 2003:  This flag is not supported.
VDS_SF_SUPPORTS_MIRRORED_CACHE
Value: 0x100000
The subsystem supports LUNs that use a mirrored cache. See the bUseMirroredCache member of the VDS_HINTS2 structure.

Windows Server 2008, Windows Vista and Windows Server 2003:  This flag is not supported.
VDS_SF_READ_CACHING_CAPABLE
Value: 0x200000
The subsystem supports read caching on LUNs. See the VDS_LF_READ_CACHE_ENABLED value of the VDS_LUN_FLAG enumeration and the bReadCachingEnabled member of the VDS_HINTS2 structure.

Windows Server 2008, Windows Vista and Windows Server 2003:  This flag is not supported.
VDS_SF_WRITE_CACHING_CAPABLE
Value: 0x400000
The subsystem supports write caching on LUNs. See the VDS_LF_WRITE_CACHE_ENABLED value of the VDS_LUN_FLAG enumeration and the bWriteCachingEnabled member of the VDS_HINTS2 structure.

Windows Server 2008, Windows Vista and Windows Server 2003:  This flag is not supported.
VDS_SF_MEDIA_SCAN_CAPABLE
Value: 0x800000
The subsystem supports media scanning on LUNs. See the VDS_LF_MEDIA_SCAN_ENABLED value of the VDS_LUN_FLAG enumeration and the bMediaScanEnabled member of the VDS_HINTS2 structure.

Windows Server 2008, Windows Vista and Windows Server 2003:  This flag is not supported.
VDS_SF_CONSISTENCY_CHECK_CAPABLE
Value: 0x1000000
The subsystem supports consistency checking on LUNs. See the VDS_LF_CONSISTENCY_CHECK_ENABLED value of the VDS_LUN_FLAG enumeration and the bConsistencyCheckEnabled member of the VDS_HINTS2 structure.

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

Remarks

This enumeration provides the values for the ulFlags member of the VDS_SUB_SYSTEM_PROP and VDS_SUB_SYSTEM_PROP2 structures.

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

Requirements

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

See also

VDS Enumerations

VDS_SUB_SYSTEM_PROP

VDS_SUB_SYSTEM_PROP2