IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES IOCTL (ntddstor.h)
The IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES request is sent to the storage class driver to determine available and used mapping resources on a storage device.
Major code
Input buffer
None.
Input buffer length
None.
Output buffer
The buffer at Irp->AssociatedIrp.SystemBuffer contains a STORAGE_LB_PROVISIONING_MAP_RESOURCES structure.
Output buffer length
Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location of the IRP indicates the size, in bytes, of the buffer, which must be at least sizeof(STORAGE_LB_PROVISIONING_MAP_RESOURCES).
Status block
The Status field can be set to STATUS_SUCCESS, or possibly to STATUS_INVALID_DEVICE_REQUEST, STATUS_BUFFER_TOO_SMALL, STATUS_BUFFER_OVERFLOW, or some other error status.
Remarks
If logical block provisioning is enabled on a LUN, resource mapping counts may be reported from the storage device. Resource mapping information is obtained by using the IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES request. A storage monitoring application can use this IOCTL to query resource mapping conditions before a resource threshold or exhaustion event is logged.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Windows 8 and later versions of Windows. |
| Header | ntddstor.h (include Ntddstor.h) |
See also
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