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Controller duplexing uses two identical controllers with independent, identical sets of drives
containing identical data. In the unlikely event of a controller failure, the remaining controller and
drives will service all requests.
Neither of these alternative fault-tolerance methods supports online spares or automatic data recovery, nor
do they support auto-reliability monitoring or interim data recovery.
If you decide to use one of these alternative methods, configure your arrays with RAID 0 for maximum
storage capacity and refer to your operating system documentation for further implementation details.
Drive arrays and fault-tolerance methods 104
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