There is a general misconception that 360K disks, 48TPI, can’t be used in a 1.2Meg, 96TPI, drive. They can but there are a few rules that must be followed.
1. A pre-formatted 360K disk (48TPI), one that was formatted in 360K drive, can ONLY be read in a 1.2Meg drive (96TPI). You can NEVER write to this type of disk. Doing so will trash it.
2. You can create a 360K disk in a 1.2Meg drive BUT you MUST first erase the disk with a bulk eraser like those used to erase real-to-real or VHS tapes. After the disk is erased it can be formatted to 360K and the disk can be read and written in a 1.2Meg drive. The disk can also be read in a standard 360K drive. However, you should not write to a disk made in this manor. You can under certain circumstances but as a general rule, don’t do it.
In general, disks made in one type of drive are read/write in that same type of drive and read only in the opposite type.
I have been using Teledisk, Winimage, 22disk and other programs for many years without problems. I use Teledisk on a regular basis to create 40 track disks in my 1.2Meg drive for use on my Kaypro 10. Unless the .td0 file is corrupt, and I have found a few, it works every time. I have also used 22disk to move files to and from 40 track disks that were made in a 1.2Meg drive on my PC.
Back in the old days when 40 track 5-1/4 floppies were first introduced, single sided I might add, they were always shipped un-formatted. As the good computers died off and left us with the PC (Pathetic Computer) disk manufacturers started shipping pre-formatted disks. Once a disk has been formatted or written to at 48TPI it can’t be written to at 96TPI.
Don
1. A pre-formatted 360K disk (48TPI), one that was formatted in 360K drive, can ONLY be read in a 1.2Meg drive (96TPI). You can NEVER write to this type of disk. Doing so will trash it.
2. You can create a 360K disk in a 1.2Meg drive BUT you MUST first erase the disk with a bulk eraser like those used to erase real-to-real or VHS tapes. After the disk is erased it can be formatted to 360K and the disk can be read and written in a 1.2Meg drive. The disk can also be read in a standard 360K drive. However, you should not write to a disk made in this manor. You can under certain circumstances but as a general rule, don’t do it.
In general, disks made in one type of drive are read/write in that same type of drive and read only in the opposite type.
I have been using Teledisk, Winimage, 22disk and other programs for many years without problems. I use Teledisk on a regular basis to create 40 track disks in my 1.2Meg drive for use on my Kaypro 10. Unless the .td0 file is corrupt, and I have found a few, it works every time. I have also used 22disk to move files to and from 40 track disks that were made in a 1.2Meg drive on my PC.
Back in the old days when 40 track 5-1/4 floppies were first introduced, single sided I might add, they were always shipped un-formatted. As the good computers died off and left us with the PC (Pathetic Computer) disk manufacturers started shipping pre-formatted disks. Once a disk has been formatted or written to at 48TPI it can’t be written to at 96TPI.
Don