Ticket #11172 (closed enhancement: obsolete)
5.25 inch floppy image wont work/mount correctly in Virtual Box
|Reported by:||DrSvenne||Owned by:|
I discovered some old 5.25 inch (360 KB and 1.2 MB) Floppy Disks which I scanned with WinImage to generate *.IMA-files, they mounts correctly in Virtual Box and I can run DOS 5.0 and 6.22 as VMs. However when trying to format the floppy images from within the VMs, VirtualBox seems to assume that all floppy images is of 1.44 MB size and thereby crashes and corrupts the *.IMA files.
Also the same problem seems to occur when using 720 KB floppy images.
I know that this might be an obsolete feature, but the fact was that I had very old backups on these floppys, which I thought I had lost, and it was fun to rediscover them. However I needed to creat a DOS 5.0 and 6.22 VM in order to unpack and use the backups.
(With todays PC hardware its not possible to install an old DOS 5.x or 6.x system, therefore using VMs instead)
Besides that VirtualBox seems not to be able to mount *.IMZ files created by WinImage (= compressed IMA-files)
There is another strange behaviour of VirtualBox when running DOS 5.x and 6.x as VMs and its that the VMs tends to almost lock the CPU at 50-100 % load all the time.
Also character mode DOS apps, like Borland TurboPascal and EDIT.EXE cannot be correctly resized when run in DOS as VM, the window remains small.