红帽全球峰会9.13. 将镜像 LVM 设备转换为 RAID1 逻辑卷
您可以将片段类型为 mirror 的现有镜像 LVM 设备转换为 RAID1 LVM 设备。要执行此操作，请使用带有 --type raid1 参数的 lvconvert 命令。这会将名为 mimage 的镜像子卷重命名为名为 rimage 的 RAID 子卷。
另外，它还会删除镜像日志，并为与对应的数据子卷在同一物理卷上的数据子卷创建名为 rmeta 的元数据子卷。
流程
查看镜像逻辑卷 my_vg/my_lv 的布局：
# lvs -a -o name,copy_percent,devices my_vg LV Copy% Devices my_lv 15.20 my_lv_mimage_0(0),my_lv_mimage_1(0) [my_lv_mimage_0] /dev/sde1(0) [my_lv_mimage_1] /dev/sdf1(0) [my_lv_mlog] /dev/sdd1(0)将镜像逻辑卷 my_vg/my_lv 转换为 RAID1 逻辑卷：
# lvconvert --type raid1 my_vg/my_lv Are you sure you want to convert mirror LV my_vg/my_lv to raid1 type? [y/n]: y Logical volume my_vg/my_lv successfully converted.
验证
验证镜像逻辑卷是否转换为 RAID1 逻辑卷：
# lvs -a -o name,copy_percent,devices my_vg LV Copy% Devices my_lv 100.00 my_lv_rimage_0(0),my_lv_rimage_1(0) [my_lv_rimage_0] /dev/sde1(0) [my_lv_rimage_1] /dev/sdf1(0) [my_lv_rmeta_0] /dev/sde1(125) [my_lv_rmeta_1] /dev/sdf1(125)
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