Welcome to the ZyXEL Networking Glossary - your definitive source for descriptions of networking terms and ZyXEL's product features.
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A degraded hard drive array is one that is damaged by a hard drive failure but can still be repaired by replacing the failed drive. The array is still operational but at risk since all of the array’s data may be lost if a second hard drive fails. Data access may also be slower from a degraded array. It’s recommended that you replace a failed drive and repair the array as soon as you can.