Help needed to read IBM 1M formated floppy on something modern.

On 14 Nov 2006 at 15:20, Bob wrote: Assuming that you're dealing with DOS/Windows, those diskettes should be formatted in 9x2x512 format, if they were done right. Readable in any modern 3.5" drive. However--back in the days when there was a price premium on 1.44 MB media, some used the 720K media as 1.44MB, as the IBM drives didn't care about the density hole on the diskette. Some even used the DS2D media as 2.88MB DSED, but I doubt that this is the case here. If this is what was done, you have three choices. 1. Find an IBM PS/2 and read the diskettes there. 2. Find a 1.44MB drive that you can jumper to read the disks as high density, without regard to the density window. Sometimes a 720K drive will READ (but not write) DSHD media. 3. Drill or punch a hole in each diskette so that they're seen as high-density diskettes by modern equipment. There are a couple of other scenarios--1) that these aren't IBM- created diskettes at all, but created on something like a NEC 9801, in which case you'll need to modify a 3.5" drive to read them. The other possibility is that these aren't DOS/Windows format diskettes at all. That's a whole 'nother issue. I'm going to assume that each of these diskettes contains a valid boot sector, so that you're not getting spurious "General Failure" errors. Cheers, Chuck