Dynamic Root Disk (DRD) is
a software tool containing a set of commands that enable you to clone
a system image to another hard disk and modify the image without shutting
down the system. DRD significantly reduces system downtime and allows
you to do software maintenance during normal business hours.
Using DRD, you can perform software maintenance on the cloned
(inactive) system image without affecting the active system image.
When modifications are complete, you can boot the cloned system image
on the original system or on a different system. If you do not want
to use the cloned system image immediately, you can leave it in place
to be utilized at a later time.
Other uses of DRD include using the clone for quick software
recovery or using the clone to boot another system, which is referred
to as rehosting. For details of rehosting, see Rehosting and Unrehosting Systems.
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