DoubleSpace and DriveSpace
From Just Solve the File Format Problem
(Redirected from DoubleSpace)
DoubleSpace, later named DriveSpace, is a disk compression utility for DOS and Windows.
It was included with MS-DOS v6.0-6.2 as DoubleSpace, dropped from v6.21, then added back (with some changes) to v6.22 as DriveSpace. It is also integrated into some versions of Windows.
It is derived from DoubleDisk by Vertisoft Systems.
Format details
The compressed volume is in the form of a file hosted on a non-compressed hard disk. Possible names for the file include DBLSPACE.001 and DRVSPACE.001.