You may take one of your physical 3390 DASD and try to convert it to 3380 track compatibility mode if this function is supported by your DASD vendor.
To do this, attach a DASD to yourself, run ICKDSF's command INSTALL UNIT(vaddr) SETMODE(3380), detach the disk and vary it off and back on. On modern DASD systems INSTALL is usually done by the vendor, so check with them first. Ivica
