STORAGE_LB_PROVISIONING_MAP_RESOURCES - NtDoc
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// ntddstor.h
typedef struct _STORAGE_LB_PROVISIONING_MAP_RESOURCES {
ULONG Size;
ULONG Version;
UCHAR AvailableMappingResourcesValid : 1;
UCHAR UsedMappingResourcesValid : 1;
UCHAR Reserved0 : 6;
UCHAR Reserved1[3];
UCHAR AvailableMappingResourcesScope : 2;
UCHAR UsedMappingResourcesScope : 2;
UCHAR Reserved2 : 4;
UCHAR Reserved3[3];
ULONGLONG AvailableMappingResources;
ULONGLONG UsedMappingResources;
} STORAGE_LB_PROVISIONING_MAP_RESOURCES, *PSTORAGE_LB_PROVISIONING_MAP_RESOURCES;
View the official Windows Driver Kit DDI referenceNo description available.
The STORAGE_LB_PROVISIONING_MAP_RESOURCES structure contains, when valid, the count of available and used bytes mapped to a storage device. This structure is returned from an IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES request.
SizeThe size of this structure. This is set to sizeof(STORAGE_LB_PROVISIONING_MAP_RESOURCES).
VersionThe version of this structure.
AvailableMappingResourcesValidThe validity of the AvailableMappingResources member.
| Value | Meaning |
|---|---|
| 0 | AvailableMappingResources is not valid. |
| 1 | AvailableMappingResources is valid. |
UsedMappingResourcesValidThe validity of the UsedMappingResources member.
| Value | Meaning |
|---|---|
| 0 | UsedMappingResources is not valid. |
| 1 | UsedMappingResources is valid. |
Reserved0Reserved.
Reserved1Reserved.
AvailableMappingResourcesScopeResources scope available to a LUN or a LUN pool.
| Value | Meaning |
|---|---|
| LOG_PAGE_LBP_RESOURCE_SCOPE_NOT_REPORTED 0 |
Mapping resources are not reported. |
| LOG_PAGE_LBP_RESOURCE_SCOPE_DEDICATED_TO_LUN 1 |
Mapping resources dedicated to a LUN. |
| LOG_PAGE_LBP_RESOURCE_SCOPE_NOT_DEDICATED_TO_LUN 2 |
Mapping resources dedicated to a LUN pool. |
UsedMappingResourcesScopeResources scope used by a LUN or LUN pool.
| Value | Meaning |
|---|---|
| LOG_PAGE_LBP_RESOURCE_SCOPE_NOT_REPORTED 0 |
Mapping resources are not reported. |
| LOG_PAGE_LBP_RESOURCE_SCOPE_DEDICATED_TO_LUN 1 |
Mapping resources dedicated to a LUN. |
| LOG_PAGE_LBP_RESOURCE_SCOPE_NOT_DEDICATED_TO_LUN 2 |
Mapping resources dedicated to a LUN pool. |
Reserved2Reserved.
Reserved3Reserved.
AvailableMappingResourcesThe count, in bytes, of the available mapping resources for a disk.
UsedMappingResourcesThe count, in bytes, of the used mapping resources for a disk.
As a managed storage element, resource usage for a thinly provisioned LUN is tracked. Resource allocation is logged for the device by the storage subsystem. A storage application can query for this resource usage information using the IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES request.
Logging of mapped resource counts is dependent on support from the storage device. The AvailableMappingResources and UsedMappingResources members contain resource counts when their respective validity fields are set.
Resource counts are in bytes instead of totals of blocks or slabs.
IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES