Here's our setup: Both drives are SATA-cabled. We have a Promise FastTrack 378 controller, with the drives set...
up in striping and independent. The computer consist of an Asus P4 3.0 Windows 2000 SP4.
This will save time and the necessity of having to load both drives from scratch. Many programs require a boot disk in DOS. Also, how is the RAID controller handled? It must a simple answer, but it's beyond my megabit brain.
Ultimately, there are snapshot or volume replication products that allow you to create local or remote copies of disk volumes. These copies can be subsequently accessed by the system or replicated back to the original volume in case the original became corrupt. At that point however, the solution has moved far away from a simple copy of drive 1 to drive 2. As always, it then becomes a question of measuring business requirements against cost.
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