Abour 30 years ago, I remember using Disk Doubler / Auto Doubler to wring more out of an 80 Mb hard drive on a IIsi... having it work in the background seemed s

Abour 30 years ago, I remember using Disk Doubler / Auto Doubler to wring more out of an 80 Mb hard drive on a IIsi... having it work in the background seemed sort of miraculous. https://en.m.wikipedia.org/wiki/DiskDoubler https://en.m.wikipedia.org/wiki/DiskDoubler