How to Create a Ramdisk in MS DOS

Written by alexander gokhfeld
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How to Create a Ramdisk in MS DOS
RAMdisk allows users to have virtual disk drives. ( Images)

A RAMdisk, or RAM drive, is a block of the primary computer memory accessed by MS-DOS as virtual disk drive. It transfers data much faster than a hard disk drive, since it has no moving parts, but data on RAMdisk will be lost when power is off or you reboot the computer. A RAMdisk appears in MS-DOS as a physical hard disk with the chosen size, drive letter and file system. You can copy, move and delete files on it. The set-up of the DEVICE option in the CONFIG.SYS file allows users to create the RAMdisk in MS-DOS operating system.

Skill level:


  1. 1

    Boot your computer into MS-DOS operating system.

  2. 2

    Type in "edit" at the command line prompt to open editor program.

  3. 3

    Click the "File," "Open" and double-click on the "config.sys" file.

  4. 4

    Add the following lines at the beginning of the file:



    DEVICE=C:\RAMDRIVE.SYS 32767 512 256 /e R:

  5. 5

    Click "File," "Save As," "OK" to create the "R" RAM disk in MS-DOS.

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