>DoubleSpace was absent in 6.2 if I remember correctly and reappeard in 6.22
>as DriveSpace. M$ had *stolen* the code for the compression or something
>simular, so they needed to remove it, then paid 50 million $ for the code
OK... MS-DOS 6.0x had DoubleSpace (algorithms stolen from Stac, no decompress
option, very unreliable). MS-DOS 6.1x had no disk compression utility at all.
MS-DOS 6.20 and (IIRC) 6.21 had DoubleSpace (again, Stac's algorithms but this
time with a decompress option and 'DoubleGuard' which would pop up a message
during boot-up to tell you 'DoubleGuard has detected an error on your
compressed hard drive' - notice it didn't stop DoubleSpace mucking it up).
MS-DOS 6.22 had DriveSpace (licensed Stac algorithms with a few changes to stop
Stacker and DoubleSpace volumes being mounted as DriveSpace, and vice versa.
This also had decompression options).
MS denied nicking the code from Stac, but it was later shown that they were a
bit too similar to be coincidence, so MS had to license it off Stac - rather
like Open/DR-DOS has. As an aside, did DR DOS 6 have Stacker, or was it
introduced with Novell DOS? I seem to recall DR advertising DR DOS 5 - or
maybe 6 - as having 'UltraStor' or something similar technology, not Stacker.
Regards, Home page: http://www.geocities.com/SiliconValley/Horizon/8786
Ben A L Jemmett ICQ: 9848866 JGSD e-mail: [EMAIL PROTECTED]
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