IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// ntddstor.h

// CTL_CODE(0x002d, 0x502, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES 0x002D5408
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Windows Driver Kit DDI reference (ni-ntddstor-ioctl_storage_get_lb_provisioning_map_resources)

IOCTL_STORAGE_GET_LB_PROVISIONING_MAP_RESOURCES IOCTL

Description

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.

Parameters

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).

Input/output buffer

Input/output buffer length

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.

See also

STORAGE_LB_PROVISIONING_MAP_RESOURCES

View the official Windows Driver Kit DDI reference

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