Accessing the data in the failed disk (degraded read) with low latency is crucial for an erasure-coded storage system. In this work, the maximum distance separable (MDS) array code with the property of degraded-read friendly (DRF) is discussed. For the DRF MDS array code with 2 redundant nodes and the sub-packetization level of 2, the lower bound of its access bandwidth is derived.

翻译：在低潜伏状态下存取失灵磁盘(已变换读)中的数据对于消除编码储存系统至关重要。在这项工作中,将讨论最大距离可分离(MDS)阵列代码与退化友好(DRF)特性的特性。对于DRF MDS阵列代码,有2个冗余节点和2个次包装级的2个,则将得出其访问带宽的下限。