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I've got ImageDisk installed on my old 486, and I've been ripping some disks for archival purposes (some 3.5", some 5.25"). It spits out .IMD files, which contain some amount of header and metadata, and some basic compression. Is there a simple utility for converting these to a format that could be used with VirtualBox or other virtualization software, dd, or WinImage, in cases where the disk in question is FAT? I see many references to BIN2IMD, which converts raw images to ImageDisk format, but I'm not finding anything for doing the reverse.

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Keir Fraser’s Disk Utilities include an analysis and conversion program, disk-analyse, which can convert to and from ImageDisk files (among others). To convert an ImageDisk file to a plain MFM disk image suitable for use with virtualisation software, run

disk-analyse image.imd image.img

It might take a little while, and the program is silent at first which can be surprising.

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  • Got it up and running on my Raspberry Pi. Just do make; sudo make install; sudo ldconfig in the libdisk directory, then make; sudo make install in disk-analyse. Takes a minute or two to convert a 1.2 MB image on my Pi, but works like a charm.
    – db2
    Oct 7, 2018 at 19:17
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libdsk can convert IMD to a raw disc image. 

dskconv -otype raw file.imd file.img

or in versions prior to 1.5.5:

dsktrans -otype raw file.imd file.img
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  • Oh nice, it's got Windows binaries too. I'll have to give this one a try.
    – db2
    Oct 8, 2018 at 11:19

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