4.After RAID online migration is finished, use Mirror Split on the Primary OS (Array 1) to split it into 2 x RAID 1 arrays. The split array is shown as “Array 3 Primary OS.”

5.Rename Array 3 to Backup OS with a date for easy identification. The array is then the new backup operating system array.

The aforementioned steps of system split, system swap and system repair assure that no matter what damage is caused to the system, it can be repaired for immediate service after being set up, without further configu- ration. This further increases availability of the system and minimizes system down time caused by accidents and hardware failure.

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Advantech user manual DNS-3200 User’s Manual