IOCTL_DISK_GET_PARTITION_INFO_EX IOCTL (ntdddisk.h)

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_EX 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_EX).

Status block

The Information field is set to the size, in bytes, of the returned data. The Status field can be set to STATUS_SUCCESS, or possibly to STATUS_INVALID_PARAMETER, STATUS_INFO_LENGTH_MISMATCH, STATUS_INSUFFICIENT_RESOURCES, STATUS_INVALID_DEVICE_REQUEST, or STATUS_BUFFER_TOO_SMALL.

Requirements

See also

PARTITION_INFORMATION