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Video servers are high@ vulnerable to disk failures because they employ large-scale disk arra.vs to support many clients and multimedia contents. To cope with such a structural weakness, they reserve a significant portion of their resource contingent on disk operability, leading to its under-utilization in normal operation mode. This paper addresses the improvement of resource utilization in faulttolerant multi-resolution video servers. For this purpose, we propose a QoS degradation method anddoi:10.1109/tce.2003.1209531 fatcat:voga4xfbbrhshgs7snnuuuokyi