In a message dated 98-06-26 21:30:20 EDT, you write: << 720K drives will work fine on the original drive controller AFTER you load the driver file. I've done it dozens of times to connect my NEC Multi-Speed drives to the PC. The only problem is that you can't boot from them since the driver has to be loaded for them to work. I don't *think* the 1.44 Mb drives will work on the controller though. Joe >> i've never needed a driver file in my case. for example, i have a few xt models around here and when i need to install dos or copy files over from a later computer with only a 3.5 drive, i just plug a 720k floppy into the drive controller cable in place of the 360k drive and i'm off and running. i think i could boot off the 720 drive also. you are correct in that 1.44 drives are not supported, although i do have an adaptor card that will let hi density drives work in an xt. david