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raid 5 阵列的读性能优于单个驱动器，因为数据可同时从多个磁盘读取。由于奇偶校验必须经过计算并写入到所有磁盘，因此磁盘写入操作不会体现出该优势。
the read performance of a raid 5 array is greater than that of a single drive because data can be read from multiple disks simultaneously. disk writes do not realize the same benefit because parity must be calculated and written to all the drives.
Last Update: 2007-01-11
Usage Frequency: 1
Quality:
shift; del ： 从磁盘上永久删除当前图像。 注意， 此操作不可逆， 且无法撤销 。
shift; del: permenantly delete the image from the disk. note that this operation is irreversible and cannot be undone.
Last Update: 2011-10-23
Usage Frequency: 3
Quality: