|First caching disk controller with both write thru and write back.|
Why it's important
Prior to these products to achieve higher performance, system architects positioned high activity data on special high performance disk drives such as fixed head or solid state disk drives. The advent of cache at the subsystem level substantially improved system performance to the point where there was no longer any need for such specialized devices.
Ad for Memorex 3770 Cache, August 1978
Mrx 3770 Product Brochure , December 1978
US Patent 4,868,734, "Variable rate improvement of disc cache subsystem", Thomas E. Idleman and Jesse I.
Stamness, priority date April 30, 1984