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- VDISK
- Sets up a virtual (RAM) disk
- See also <DEVICE> <CONFIG.SYS>
-
- Virtual disks actually make your computers memory act like a disk
- drive. As a result, a virtual disk will be much faster than an actual
- disk drive. MSDOS supplies a device driver to create this virtual
- disc. Versions up to 3.3 were called VDISK.SYS. Version 4 calls it
- RAMDRIVE.SYS
-
- COMMAND TYPE: External VERSION: 3.0 and up
-
- (DOS 3.0-3.3)
- USE: DEVICE=VDISK.SYS[comment][bbb] [comment][sss][comment][ddd] [/E[:m]]
-
- comment is a message containing normal text characters.
- bbb is the size of the virtual disk in kbytes. Values between 1K and
- the memory available in your machine will be accepted.
- sss is the sector size in bytes. 128, 256, and 512 are the sizes that
- will be accepted. A smaller sector size will utilize space much
- better, but a larger sector will improve performance.
- ddd is the number of files that the virtual disk can hold. Values
- between 2 and 512 are accepted.
- /E will force VDISK to use the extended memory (memory above 1
- megabyte).
- :m is the maximum number of sectors of data that VDISK will transfer
- at a time. The possible numbers for :m are 1 through 8.
-
- EXAMPLE: DEVICE=VDISK.SYS 200 256 64
- sets up a virtual disk with 200K storage space, 256 bytes per sector,
- and 64 directory entries.
-
- (DOS 4.0 and later)
- USE: DEVICE=RAMDRIVE.SYS [bbb] [sss] [ddd] [/E] [/A]
-
- bbb is the size of the virtual disk in kbytes. Values between 16K and the
- memory available in your machine will be accepted. The default is 64k
- sss is the sector size in bytes. 128, 256, 512 and 1024 are accepted. The
- default is 512. A smaller sector size will utilize space much better,
- but a larger sector will improve performance.
- ddd is the number of root directory entries that the virtual disk can
- hold. Values between 4 and 1024 are accepted. The default is 64
- /E will place the virtual disc in extended memory (memory above 1
- megabyte). This cannot be specified with /A
- /A will place the virtual disc in LIM expanded memory. This cannot be
- specified with /E
-
- NOTE: The VDISK.SYS or RAMDRIVE.SYS device drivers must be placed in the
- CONFIG.SYS file and be used in conjunction with the DEVICE = DRIVER
- command.
- NOTE: The contents of a virtual disc will be lost when you reset or turn
- off the computer.
-