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Returns information about the type, size, and nature of a disk partition. (Floppy drivers need not handle this request.)
Major code
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
| Requirement | Value |
|---|---|
| Header | ntdddisk.h (include Ntdddisk.h) |