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IOCTL_DISK_GET_PARTITION_INFO IOCTL (ntdddisk.h)

  • Article

Returns information about the type, size, and nature of a disk partition. (Floppy drivers need not handle this request.)

Major code

IRP_MJ_DEVICE_CONTROL

Input buffer

None.

Input buffer length

None.

Output buffer

The driver returns the PARTITION_INFORMATION data in the buffer at Irp->AssociatedIrp.SystemBuffer.

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 >= sizeof(PARTITION_INFORMATION).

Status block

Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.

Requirements

Requirement Value
Header ntdddisk.h (include Ntdddisk.h)

See also

PARTITION_INFORMATION