On Mon, 7 Dec 2020, Chuck Guzis via cctalk wrote:
For a long time, the CDC 808 disk drive was standard fare on CDC 6000--4 spindles spinning stacks of what must have been 30" disks, using an array of 6-bit parallel heads. About 7 feet tall and very reliable.
Several sources said 26", but one said 39" 26" sounds about right, and is even bigger than the RAMAC (24"). 39" platter would make a good dining rooom table, instead of patio table.