Well I got around to setting up another computer with a Buslogic Bt-542B SCSI controller. It uses a DP 8473 floppy controller. Using Image Disk, it reads the Altos disk with out errors, but chokes on writing one. I get write Error No Sector on every sector. Drive is a Tandon TM848 E, tried another of the same drives with the same results. Of coarse I tried a few new floppies. The SD test program says the controller can work with SD disks. Any Ideas ?? - Jerry Jerry Wright g-wright @att.net