Itel disk drives
We had plug-compatible (mostly) 3330 disk drives (100 MB each) on our IBM mainframes. They were the top-loading washing machine format. Our Itel AS/5 (370/158) really swapped a lot due to our cheap manager not buying enough real memory and the swap disk used to vibrate so much that it would walk across the floor occasionally and the CUDI (control-unit device interface) cable would occasionally unplug itself.
Every Saturday I would come in and reseat the cables to reduce the probability of it happening during prime time.
Ah, they joys of working on real hardware!