RAM disk

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RAM disk

[′ram ‚disk]
(computer science)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

RAM disk

(operating system, storage)
A memory-resident program which mimics a hard disk drive. It uses part of computer's RAM to store data which can be accessed as files. Unlike a real disk drive, this drive forgets all stored data when the computer is turned off.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

RAM disk

A storage drive simulated in memory (RAM). Also called a "virtual disk," "virtual hard drive" or "emulated disk" (e-disk), selected files are copied from storage to the RAM disk in order to speed up processing. Before the computer is turned off, the data are saved to storage.

RAM disks for personal computers perform a similar function to in-memory databases used by enterprises for fast decision support. However, in-memory databases automatically allocate memory and periodically write changes to storage in case of hardware failure (see in-memory database).

RAM Disks vs. Disk Caches
RAM disks must be installed and configured by the user, whereas disk caches are part of the operating system. Disk caches hold chunks of disk data in memory that are frequently accessed, but they do not copy an entire file into memory for processing. See cache and SSD.


Dataram's RAMDisk for Windows
RAMDisk can reload and save its contents at startup and shutdown. The drive list is shown before and after the RAM disk was started.
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