Archival preservation of software

Just on that note, there's a problem I've been struggling with for a while. I'm trying to capture disk images for an Ensoniq Mirage sampler, which uses a slightly odd format - five sectors of 1024 bytes followed by one sector of 512 bytes. I can read the disks with piece of software intended for a similar piece of equipment, I ought to be able to write them but haven't tested this, but I can't format them. Now at the moment this isn't a huge problem, because I've got working formatter disks for the Mirage - you boot up the appropriate disk, stick a blank in, and it will format it. However, to write to the disk you need to have a format on it in the first place, so you can't write a formatter disk without having a formatted disk... Chicken and egg.