edw@ihuxm.ATT.COM (Ed Windes) (04/30/87)
I have a Teac FD-55FV-13-U, 5-1/4", 96tpi floppy drive. I am using it in a PC clone as a 720K drive. What is the difference between this drive and an 1.2M AT drive? The pidgin English document included with my drive covers the 55BV drive (360K) and the 55GFV drive (1.2M) - but doesn't mention my drive. Can I select between the two formats with a jumper? Does anyone have a number for Teac customer service? The document notes: "...in actual application, further discussion of users might be required. We would appreciate receiving your advise and comments on this application notes. Please inform to the nearest TEAC office." -- ed windes, ihnp4!ihopa!edw, (312)979-5748 -- at&t bell labs, naperville, il 6056 so hogr
farren@hoptoad.UUCP (05/01/87)
In article <1597@ihuxm.ATT.COM> edw@ihuxm.ATT.COM (Ed Windes) writes: >I have a Teac FD-55FV-13-U, 5-1/4", 96tpi floppy drive. >I am using it in a PC clone as a 720K drive. > >What is the difference between this drive and an 1.2M AT drive? >The pidgin English document included with my drive covers the >55BV drive (360K) and the 55GFV drive (1.2M) - but doesn't mention >my drive. Can I select between the two formats with a jumper? > The 55GFV is a 96 tpi drive, but uses special heads and media to achieve the 1.2M capacity. I think they also rotate at a different speed for 1.2M, but am not sure. You cannot select between the two formats on the 55FV, although a 55GV can read 720K formats as well as 1.2M. In general, higher capacity drives can read lower capacity formats, and not vice versa. -- ---------------- "... if the church put in half the time on covetousness Mike Farren that it does on lust, this would be a better world ..." hoptoad!farren Garrison Keillor, "Lake Wobegon Days"
davidsen@steinmetz.steinmetz.UUCP (William E. Davidsen Jr) (05/01/87)
In article <1597@ihuxm.ATT.COM> edw@ihuxm.ATT.COM (Ed Windes) writes: >I have a Teac FD-55FV-13-U, 5-1/4", 96tpi floppy drive. >I am using it in a PC clone as a 720K drive. > >What is the difference between this drive and an 1.2M AT drive? >The pidgin English document included with my drive covers the >... To use a 96 tpi drive for 1200k you need three things: the right controller, the right software, and the special speed drive. The 1200k drives turn at 360 rpm rather than 300, and have a transfer rate of 500k rather than 250. If this sounds just like an 8" disk drive, it is. I'm told that a standard AT controller will run an 8" drive with a little diddling of cables. I suspect that you are lacking some (or all) of the requirements. People with 1200k drive can run 720k on cheap floppies, however, which is a much lower cost per byte than the 1200k. -- bill davidsen sixhub \ ARPA: wedu@ge-crd.arpa ihnp4!seismo!rochester!steinmetz -> crdos1!davidsen chinet / "Stupidity, like virtue, is its own reward"