Are your floppy drives RX33's or RX50's? A RX50 is a two-drive-in-one unit, grey faceplate, two orange marks showing you how to insert the bottom floppy in upside down. You can't format a RX50 on your RQDX controller, you have to do it elsewhere. PUTR is a common choice on a PC, get it at ftp.dbit.com. A RX33 is a TEAC 5.25" HD disk drive. Put a 1.2Mbyte disk in, tell it "FORMAT DU1:", and you'll have it formatted as a RX33. A RX33 can also read/write RX50's, but it can't format them on a DEC RQDX controller. Note that there are third-party Q-bus controllers that let you format RX50's, and if you're running RT-11 5.7 you can use FORMAT/SINGLE on these controllers to make RX50's. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927