I have some older (Year 2002 or 2003) 'Ketron Disk Library SD1'. Also the internal factory styles from SD1.
Tried seek info about it up at Ketrons site, but don't think the disks are availiable salesware anymore.
During the winter, if I blow the dust off of my old archive HD's, I most likely will find something more from the SD and X series.
It's quite a while since I had SD1 now..... amazing how the time flies!