seaken
Veteran Member
Do you want to keep the DOS 6.22 files? If so, I would first install DOS 6.22 to a CF card. Or, have floppy images of DOS 6.22 install disks as a backup.
Now, as already mentioned above by others, boot from the DOS 3.3 floppy disk. Make sure your boot disk has FDISK and FORMAT on it. Now, use FDISK to remove the partitions on the 20MB MFM drive. Next make a NEW partition on this same 20MB drive. Run FDISK /MBR on the 20 MB drive. Reboot again from the DOS 3.3 floppy. Next, run FORMAT /sys on the 20 MB drive. Finally, COPY all the files from the DOS 3.3 diskette over to the root directory of the 20MB hard drive. Take out the DOS 3.3 floppy and reboot. You should now have DOS 3.3 booting from the 20MB hard drive.
I have also used several CF cards to have several different OS's booting from whichever CF card I insert into the XTIDE. For instance, I have one CF card with DOS 5.0, one with Concurrent DOS, one with DR-DOS 5.0 and one with DOS 3.3. The Concurrent DOS and DOS 3.3 CF cards required me to clear them first, run FDISK and FDISK /MBR creating only 32MB partitions, then formatting them after booting from the DOS 3.3 diskette.
In all cases it is easiest to have a working floppy boot disk. But emulation on a modern system works also.
Seaken
Now, as already mentioned above by others, boot from the DOS 3.3 floppy disk. Make sure your boot disk has FDISK and FORMAT on it. Now, use FDISK to remove the partitions on the 20MB MFM drive. Next make a NEW partition on this same 20MB drive. Run FDISK /MBR on the 20 MB drive. Reboot again from the DOS 3.3 floppy. Next, run FORMAT /sys on the 20 MB drive. Finally, COPY all the files from the DOS 3.3 diskette over to the root directory of the 20MB hard drive. Take out the DOS 3.3 floppy and reboot. You should now have DOS 3.3 booting from the 20MB hard drive.
I have also used several CF cards to have several different OS's booting from whichever CF card I insert into the XTIDE. For instance, I have one CF card with DOS 5.0, one with Concurrent DOS, one with DR-DOS 5.0 and one with DOS 3.3. The Concurrent DOS and DOS 3.3 CF cards required me to clear them first, run FDISK and FDISK /MBR creating only 32MB partitions, then formatting them after booting from the DOS 3.3 diskette.
In all cases it is easiest to have a working floppy boot disk. But emulation on a modern system works also.
Seaken