去EMC面试，问了这么一个问题

CJ_ane

vg由一块PV组成，VG中有一个LV。

然后加一块盘到VG中，再使用mirrorvg。

问，是不是会出现LV的copies分布在hdisk0 和 hdisk1上？

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答：取决于mirrorvg的参数，若指定非严格模式可能会出现上述情况。若指定严格模式不会出现上述情况。

严格模式参数:
mklvcopy
       -s strict
            Determines the strict allocation policy. Copies of a logical partition can be allocated to share or not to share the same physical volume. The strict variable is
            represented by one of the following:
              y
                   Sets a strict allocation policy, so copies for a logical partition cannot share the same physical volume. flag.
              n
                   Does not set a strict allocation policy, so copies for a logical partition can share the same physical volume.
              s
                   Sets a super strict allocation policy, so that the partitions allocated for one mirror cannot share a physical volume with the partitions from another
                   mirror. See Note 4 for other effects of the superstrict allocation policy on mklvcopy behavior.
            Note: When changing a nonsuper strict logical volume to a super strict logical volume, you must specify physical volumes or use the -u flag.