Storage & Data Management
Data storage devices made from DRAM, flash, or other memory technologies are collectively called Solid State Disks (SSDs), since they have no moving components. The first commercially successful SSD was delivered to the mainframe market in 1978 and cost $8,800 per megabyte. Using today’s storage pricing metric, that equates to $8.8 million per gigabyte! Those first SSDs were channel-attached storage devices based on volatile DRAM chips that lost all their contents when electrical power was out. Soon after their introduction, SSDs addressed the DRAM volatility issue by offering battery and hard disk backup options, and eventually added fault-tolerant designs that protected data from all types of failures.