Vintage DiskTwin Automatic Continuous Backup Software Only for Apple Macintosh

Description

You are buying one or more copies of vintage DiskTwin continuous backup software for Apple Macintosh Nubus computers
DiskTwin was an unusual Nubus card introduced by Golden Triangle Computers in 1992.  Here's a quick summary from
Protect Your Macintosh
by Bruce Schneier (1994):
DiskTwin, from Golden Triangle Computers,
is
a hardware and software disk twinning product that provides continuous backup of any
SCSI
volume you can mount on your Desktop. Whenever the Macintosh writes to one drive, DiskTwin writes identical information to a second drive, constantly providing you with a current backup.
DiskTwin consists of a NuBus board; an application; an INIT; and a cdev.  The hardware acts
as
a second
SCSI
port, to which one or more twin drives can be connected. After installing and connecting the hardware, the two drives must be synchronized: You must create an exact duplicate of the primary drive on the twin. Once the two drives are in sync, any changes that you make to the primary drive are instantly carried out on the twin drive.
DiskTwin
has
an option called automatic cut-over, which
causes
the twin to replace the primary drive the instant a failure occurs. This feature can be critical for users worried about downtime. Unfortunately, if the drive failure
is
accompanied by a system crash, this feature does not function, and you have to change drives manually.
DiskTwin works silently and unobtrusively in the background.
You
never even know it's working, until disaster strikes and you need it.
DiskTwin is sort of like RAID in that it provides continuous redundant storage of data, but it's implemented in a completely different way.  You can probably find more information about DiskTwin through Google.
Elsewhere I have offered vintage DiskTwin Nubus cards with software.  But by popular request, this listing is for DiskTwin software
only
.  Your DiskTwin 800K floppy disk will contain the DiskTwin control panel and the DiskTwin Init, both version 2.1.  If you already have the card, but need software this is probably your best chance.  Please do your research to be sure that this software is compatible with your Mac and OS version.
I have been collecting and restoring vintage computers for a long time.  Please see my other auctions for vintage Macs and Mac parts, plus occasional other vintage computing items.
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FREE
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