DiskTwin is a Macintosh software package that works with a NuBus card and a
second SCSI bus, to make a copy of the contents of a primary hard drive
onto a secondary hard drive. Technically, this operation is known as disk
duplexing.
Disk duplexing is a technology widely used in the mainframe and
minicomputer world and in large microcomputer networks to ensure continuous
operation where users cannot afford to lose any data or experience down
time.
Here are the steps required to use DiskTwin:
1) Drop the DiskTwin control panel device (CDEV) into your System Folder.
2) Place the DiskTwin NuBus card in your Macintosh.
3) Attach a drive of the same kind as your primary disk onto the DiskTwin
card. For example, if you have an Apple Quantum 80 internal, connect
an Apple Quantum 80 external to the DiskTwin card.
4) Restart your computer, and select the drive you want to copy. The
twin is invisible to the Macintosh desktop so it can't be used
accidentally.
When you do need it, you can immediately mount the twin onto the desktop
from the DiskTwin control panel.
DiskTwin runs continuously, creating a copy of your primary disk as often
as you save to disk. DiskTwin won't slow your system. When your hard
disk fails, mount the twin and you're back in business. Should the
Macintosh SCSI hardware fail, your DiskTwin SCSI port remains operational.
You can find the address and phone number for Golden Triangle Computers,
Inc. in a separate article in the Tech Info Library.