Barry: Are you using a 360k drive, or a reconfigured 1.2Meg? If the 1.2 M, use the device=driver.sys command in config.sys to set up a "d" drive as 360k. 1.2M are noticably inconsistent when writing and reading 360k, sometimes the disk will work, other times the same disk wont. -Mike Barry Peterson wrote:

Barry Peterson wrote: First of all, I'm not sure why you are reconfiguring the BIOS since you can format 360K disks in your 1.2 drive with "no problem" using the /4 (DOS 2.x or later I think) or /F:360 (DOS 5.0 or later) switch (type "format /?" at the dos prompt to find out possible switches assuming you are using DOS 5.0 or greater.) The reason for the quotes around "no problem" is that some people have wrongly assumed you can format 360K disks in a 1.2 MB drive and just use them in a 360K drive. This is only true if the disk being formated has not been previously formated or written to in a 360K drive. Sometimes, you can get away with it, but for greatest reliability, the 360K disk needs to be bulk erased before being formated in the 1.2 MB drive. Once a 360K disk has been written to on a 360K drive, writing to it on a 1.2 MB drive can render the disk impossible to use on the 360K drive. FWIW, the head width on the 360K drive is wider than the head in a 1.2 MB drive, and that is what can cause problems.