Free Ramdisk for Windows Vista, XP, 2000 and 2003 Server

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Ramdisk or RAM-Disk is a virtual hard drive based on software abstraction that treats a segment of random access memory (RAM) as secondary storage which is similar to hard disks, except with advantage that ramdisk is a lot faster and access time is greatly improved. As there is no mechanical moving parts involved, there won’t be question of wear and tear too. Ramdisk has one obvious downside, that it’s volatile and not solid state. Contents in Ramdisk is stored in computer RAM, which will be lost when the power of computer is switched off.

With these benefits and limit, ramdisk can be used to store frequently accessed yet less important temporary data to speed up the system performance, such as swap space for virtual memory, temporary files used for programs such as Internet Explorer, BT client, P2P eMule, compression utility, translation software and etc, frequently accessed data from a database

or used to hold uncompressed programs for short periods. From privacy point of view, Ramdisk is also a working drive for decrypted version of encrypted document, as all trace of the data will be wiped and deleted once power off.

There are plenty of Ramdisk driver and software available, such as RamDisk9xME, RAMDiskXP, RAMDiskSE and RAMDiskVE from Cenatek, RamDisk and RamDisk Plus from SuperSpeed, RAMDisk Enterprise Lite and Full version plus 64 MB limited free RAMDiskbased on Microsoft Ramdisk below from QSoft, and Ramdisk.sys driver for Windows 2000 from Microsoft published under KB257405. However, most of these Ramdisk drivers either is not free, or limit in its functionality especially on the size on RAM-disk. Some not even support Windows Vista.

The following freeware RRamdisk.sys, originally written by Gavotte based on Microsoft’s Ramdisk.sys, and later being added a GUI interface by lyh728 is not only free to use, it also stable, doesn’t have size limitation, supports popular FAT16，FAT32, NTFS filesystems, and supports Windows 2000 operating system and above including Vista.

Download Gavotte Ramdisk with GUI (ramdisk.zip).
Alternative download link.

To use Ramdisk, the most important requirement is that the system has a lot of memory, much a lot than the size of Ramdisk that you intends to create. It works on system with minimum 256 MB RAM, where you’re recommended not to set Ramdisk with size more than 64 MB.

Installation and setup of Ramdisk is pretty simple. Unpack the zip archive to a folder, and run ramdisk.exe. In Windows Vista, you need to right click on it and select “Run as Administrator”, if not you will get a Failed error message. Click on Install Ramdisk to install RRamdisk.sys driver. Answer Yes or Allow if prompted with driver not signed with valid digital signature or can’t verify the publisher of this driver software warning message. Once Ramdisk is installed, all buttons that previously grayed out inactive are now activated.

Now you can set the disk size in Bytes, configure the drive letter for the Ramdisk. You can also specify which media type is the drive - RAM Drive, Fixed Media or Removable Media (for simulating a floppy drive). The default choice, Fixed Media indicates that the Ramdisk is simulating a hard disk drive should work in most case. Click on OK when done with configuration. Note that if you modify the settings of the Ramdisk during the time when system process is accessing the Ramdisk, you will require to reboot the system. Caveat is that, if you put IE Temporary Internet files into the Ramdisk, you will always need to restart computer even though you’re not running IE.

A additional drive, the Ramdisk with default drive letter R: (assuming you’re not changing it) will be created, and immediately accessible for usage.

Other buttons in the Ramdisk GUI are pretty obvious in usage. Use “Remove Ramdisk” to uninstall Ramdisk, or more specifically RRamdisk.sys driver from the system. Save Image… and Load Image… allows users to save or open an image file for the whole contents of Ramdisk, useful if you want to store data in Ramdisk in unaltered state to be open up later.

Ramdisk.exe accepts a image file as its argument so that the image file can be loaded automatically into the Ramdisk from command line. Potential usage include adding of “ramdisk imgfilename” to system boot up script such as autoexec.bat to load the data into memory disk.

There are more customization and other potential usage for Gavotte Ramdisk not included in the GUI. However, you need to manually edit the registry. These additional functions are maintained by addswap.exe and rdutil.exe which explained pretty well by the Readme (included in Page 2). In most case, you won’t need to come to this extent.