VDS_LUN_PROP structure (vds.h)

Article
02/09/2023

[Beginning with Windows 8 and Windows Server 2012, the Virtual Disk Service COM interface is superseded by the Windows Storage Management API.]

Defines the properties of a LUN object.

Syntax

typedef struct _VDS_LUN_PROP {
  VDS_OBJECT_ID        id;
  ULONGLONG            ullSize;
  LPWSTR               pwszFriendlyName;
  LPWSTR               pwszIdentification;
  LPWSTR               pwszUnmaskingList;
  ULONG                ulFlags;
  VDS_LUN_TYPE         type;
  VDS_LUN_STATUS       status;
  VDS_HEALTH           health;
  VDS_TRANSITION_STATE TransitionState;
  SHORT                sRebuildPriority;
} VDS_LUN_PROP, *PVDS_LUN_PROP;

Members

id

The GUID of the LUN object.

ullSize

The size of the LUN, in bytes.

pwszFriendlyName

The name of the LUN; a zero-terminated, human-readable string.

pwszIdentification

The unique LUN identifier; a zero-terminated, human-readable string.

pwszUnmaskingList

A list specifying the computers on the network to be granted access the LUN; a semicolon-delimited, NULL-terminated, human-readable string.

If the value is "*", all computers on the network are to be granted access to the LUN. If the value is "", no computers are to be granted access to the LUN.

Note In practice, if the value is "*", most hardware providers only grant the ports and initiators on the local computer access to the LUN.

If "*" or "" is specified, no other value can be specified.

For Fibre Channel networks and serial attached SCSI (SAS) networks, each entry is a 64-bit World-Wide Name (WWN) of each port to which the LUN is unmasked, formatted as a hexadecimal string (16 characters long), most significant byte first. For example, a WWN address of 01:23:45:67:89:AB:CD:EF is represented as "0123456789ABCDEF". For more information, see the T10 specifications for Fibre Channel and SAS.

For iSCSI networks, each entry is an iSCSI qualified name (IQN) of each initiator to which the LUN is unmasked. A LUN unmasked to a particular initiator is considered to be associated with that initiator.

Note The unmasking list can contain the same WWN or IQN more than once. Duplicates are ignored.

ulFlags

The LUN flags enumerated by VDS_LUN_FLAG.

type

The LUN type enumerated by VDS_LUN_TYPE.

status

The status of the LUN object enumerated by VDS_LUN_STATUS.

health

A VDS_HEALTH enumeration value that specifies the health state of the LUN. The following are the valid values for this member.

VDS_H_UNKNOWN (0)

VDS_H_HEALTHY (1)

VDS_H_REBUILDING (2)

VDS_H_FAILING (4)

VDS_H_FAILING_REDUNDANCY (5)

VDS_H_FAILED_REDUNDANCY (6)

VDS_H_FAILED_REDUNDANCY_FAILING (7)

VDS_H_FAILED (8)

TransitionState

The transition state of the LUN enumerated by VDS_TRANSITION_STATE.

sRebuildPriority

The rebuild priority of the LUN object. A value between 0 (lowest priority) and 15 (highest priority).

Remarks

The IVdsLun::GetProperties method returns this structure to report the properties of a LUN object.

Requirements

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

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