Andries, okay, your arguments appear correct to me. Additionally there has some other work to be done... I include the patch to be applied from my point of view: (See attached file: ibmpart.diff) It includes the adaptions to the dasd_*.c files in drivers/s390/block and also should fix the fill_geometry functions to make HDIO_GETGEO work like others. Gruesse / Regards Dr. Holger Smolinski Linux for S/390 Design & Development, IBM Deutschland Entwicklung GmbH, Schoenaicher Str. 220, D-71032 Boeblingen Phone/FAX: +49 7031 16 (x902) - 4652/3456