In mirrored and RAID arrays, for example, the mean time to repair a disk failure includes the time required to reconstruct user data and check data from the failed disk on the replacement disk.

• 例如，在镜像盘和RAID阵列中，发生磁盘故障时的平均返修时间包括将故障磁盘上的用户数据和校验数据恢复到替换磁盘上所耗费的时间。