10 meg CDC Hawk hard drive.
I remember having to do backups the same way back in the mid 80's. We were using a Control Data Hawk hard drives with the same 5 fixed / 5 removable configuration.
I always did the backups when no one was around so there was no chance of distraction and forgetting where I was in the backup process.
It was always interesting going through security when I would have to fly somewhere with one of those 5meg (14") cartridges as carry on.
Ahhh.... the good old days.