Any one heard about virtual discs

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Virtual disk, in computer science, commonly called a ram disk, Random access memory used as a disk drive. Because the computer does not need to wait for the hardware to respond, reading and writing to such a "disk" can vastly improve performance. However, because a virtual disk exists only in memory, its contents must be copied to a physical disk or the data will be lost. The exception is a virtual disk on battery backed RAM, which is RAM that has its on battery; hen the power to the computer is turned off, that battery ensures that the contents of RAM are left intact. Ultralight laptops often use battery backed RAM as a virtual disk because such storage consumes less power than a hard disk.