formatting and checking floppy disks for bad sectors

WHAT DISK FORMAT? Try bulk erasing your disks before you format them, because if you are reformatting a used disk, the content in the boot sector could confuse the operating system. For PC-DOS, if track 0 is actually bad, then the disk can not be properly used for DOS. It should be destroyed, or used on an operating system that does not need track 0. (many CP/M systems use track 0 as a system track, but don't need it for a data disk) In some versions of DOS, there can be erroneous error messages about track 0 being bad, due to DOS not properly handling attempt to DMA straddling a 64K boundary. If you get the message on all disks, then look at you CONFIG.SYS and AUTOEXEC.BAT files, and add or remove a TSR or device driver, so that the TPA (Transient Program Area) will be in a different place. You have not told us which operating system, size and type of diskette, name of the "utility" that you are looking for, What is a "kiooyt"? On Wed, 15 Jan 2020, wdegroot via cctalk wrote: