Way before I got into PC / Linux I was into C64 and Amiga piracy as a kid. When we had stuff that needed more than two or three disks we'd use additional disks

Way before I got into PC / Linux I was into C64 and Amiga piracy as a kid. When we had stuff that needed more than two or three disks we'd use additional disks as a redundancy method. I don't remember all the redundancy details but basically if you have one additional disk you could have any one of the disk fully failing and you'd still be able to get back your data. I'm pretty sure that there was a command-line to do the same ; )