michaln wrote:Yes, DOS 4.x only has trouble booting from (virtual) hard disk. It has no problem using that same hard disk when booted from floppy. It's because the BIOS disk read service uses more stack space than the BIOS floppy read service.
There was no single MS-DOS 2.11, back then it was all OEM versions. And utilities like FDISK or FORMAT would have been written by the OEM. So without looking at whatever particular version you're using, I couldn't tell you what the problem might be.
I have successfully installed PC DOS 2.0 and 2.1 in VirtualBox, so that at least is possible. MS-DOS 2.x versions should in principle work too, but again it depends on what exactly the OEM did.
The 2.11 version I am trying to use is for the AT&T 6300 (There seems to be 2 versions of this also). Been doing some reading on the internet, seems that system only had 2 floppies and no harddrive. So it may be that it was re-designed not to use a harddrive, not really sure.
I did get it to work tho, I installed IBM-DOS(PC-DOS) v2.10 and for 2.11 install, just skipped the formatting part, and just did the sys.com.