Gregory's Server
Each disk platter was 39 inches in diameter and had 12 heads reading it. A complicated hydraulic system moved the heads. The edge of the platter moved much faster than the center, so the disk was divided into 6 zones, writing at higher frequencies as you go toward the edge.
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9 comments
@kenshirriff Oddly enough another company in Walled Lake, Williams Research, focused on rotation .. small gas turbine engines.    @kenshirriff love that they called this 1.5 ton monstrosity "mass memory". It sure was!  @kenshirriff why did they pose a Computer next to this main frame array ? With her glasses off? Is this to show that her role is obsolete? @kenshirriff reading the brochure, MTBF was 2000-3000 hours. At 12 hours a day that’s 250 days. Somebody check my math. @kenshirriff - Larger even than the SDS Sigma RAD head-per-track disks - 63"x30"x29" (HxWxD) - https://bitsavers.org/pdf/sds/sigma/periph/900979C_7201_7202_7203_7204_RAD_Oct69.pdf |
Sources: https://twitter.com/ComputerHistory https://www.computerhistory.org/revolution/memory-storage/8/327/926
http://s3data.computerhistory.org/brochures/bryant.model2.1965.102646212.pdf
https://twitter.com/Bitsavers http://www.bitsavers.org/pdf/bryant/