红帽全球峰会9.15. 将 RAID 镜像分离为一个独立的逻辑卷
您可以从 RAID 逻辑卷分割镜像，以创建新逻辑卷。当删除 RAID 镜像或数据子卷时，高数字的镜像会变为 down。RAID 镜像索引持续保留，但在分割前必须同步 RAID1 阵列。
流程
显示 LVM 设备 my_vg/my_lv，它是一个双向 RAID1 阵列：
# lvs -a -o name,copy_percent,devices my_vgLV Copy% Devices my_lv 12.00 my_lv_rimage_0(0),my_lv_rimage_1(0) [my_lv_rimage_0] /dev/sde1(1) [my_lv_rimage_1] /dev/sdf1(1) [my_lv_rmeta_0] /dev/sde1(0) [my_lv_rmeta_1] /dev/sdf1(0)将 RAID 镜像分成一个单独的逻辑卷：
以下示例将一个双向 RAID1 逻辑卷 my_lv 分成两个线性逻辑卷 my_lv 和 new：
# lvconvert --splitmirror 1 -n new my_vg/my_lvAre you sure you want to split raid1 LV my_vg/my_lv losing all resilience? [y/n]: y以下示例将一个三向 RAID1 逻辑卷 my_lv 分成一个双向 RAID1 逻辑卷 my_lv 以及一个线性逻辑卷 new ：
# lvconvert --splitmirror 1 -n new my_vg/my_lv
验证
在分离 RAID 逻辑卷的镜像后查看逻辑卷：
# lvs -a -o name,copy_percent,devices my_vgLV Copy% Devices my_lv /dev/sde1(1) new /dev/sdf1(1)
'%20d='M201.5%20305.5c-13.8%200-24.9-11.1-24.9-24.6%200-13.8%2011.1-24.9%2024.9-24.9%2013.6%200%2024.6%2011.1%2024.6%2024.9%200%2013.6-11.1%2024.6-24.6%2024.6zM504%20256c0%20137-111%20248-248%20248S8%20393%208%20256%20119%208%20256%208s248%20111%20248%20248zm-132.3-41.2c-9.4%200-17.7%203.9-23.8%2010-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3%2055.4%2012.5c0%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.3%2024.9-24.9s-11.1-24.9-24.9-24.9c-9.7%200-18%205.8-22.1%2013.8l-61.2-13.6c-3-.8-6.1%201.4-6.9%204.4l-19.1%2086.4c-33.2%201.4-63.1%2011.3-85.5%2026.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9%200-46.3%2046.9-14.4%2062.8-1.1%205-1.7%2010.2-1.7%2015.5%200%2052.6%2059.2%2095.2%20132%2095.2%2073.1%200%20132.3-42.6%20132.3-95.2%200-5.3-.6-10.8-1.9-15.8%2031.3-16%2019.8-62.5-14.9-62.5zM302.8%20331c-18.2%2018.2-76.1%2017.9-93.6%200-2.2-2.2-6.1-2.2-8.3%200-2.5%202.5-2.5%206.4%200%208.6%2022.8%2022.8%2087.3%2022.8%20110.2%200%202.5-2.2%202.5-6.1%200-8.6-2.2-2.2-6.1-2.2-8.3%200zm7.7-75c-13.6%200-24.6%2011.1-24.6%2024.9%200%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.1%2024.9-24.6%200-13.8-11-24.9-24.9-24.9z'/%3e%3c/svg%3e){kind=small}