CentOS挂载lvm分区VG重名问题
卷组（Volume Group）简称VG，它是一个或者多个物理卷的组合。卷组将多个物理卷组合在一起，形成一个可管理的单元，它类似于非LVM系统中的物理硬盘。
具体原因
公司业务其中一台centos服务器的操作系统启动不了，需要恢复其中的数据，将硬盘挂载到能正常启动的服务器上面，但是出现VG重名的问题，挂载不了的情况
解决思路
如下所示：
1.使用pvs/lvs/vgs查看具体的LVM情况
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[root@localhost ~]# pvs PV VG Fmt Attr PSize PFree /dev/sda3 centos lvm2 a-- 556.66g 4.00m /dev/sdc1 centos lvm2 a-- 279.39g 0 /dev/sdd2 centos lvm2 a-- 278.39g 4.00m[root@localhost ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert home centos -wi-a----- 491.09g home centos -wi------- 495.97g root centos -wi-ao---- 50.00g root centos -wi------- 50.00g swap centos -wi-ao---- 15.56g swap centos -wi------- 11.81g[root@localhost ~]# vgs -v Cache: Duplicate VG name centos: Prefer existing gEVmfo-SGj8-B3Ij-9O3U-jd3a-TftX-OMVfY6 vs new WTOf0a-fVj9-lNK2-AJOU-Q4nA-xuVk-H9AYi4 Cache: Duplicate VG name centos: Prefer existing gEVmfo-SGj8-B3Ij-9O3U-jd3a-TftX-OMVfY6 vs new WTOf0a-fVj9-lNK2-AJOU-Q4nA-xuVk-H9AYi4 Cache: Duplicate VG name centos: Prefer existing WTOf0a-fVj9-lNK2-AJOU-Q4nA-xuVk-H9AYi4 vs new gEVmfo-SGj8-B3Ij-9O3U-jd3a-TftX-OMVfY6 Archiving volume group "centos" metadata (seqno 4). Archiving volume group "centos" metadata (seqno 4). Creating volume group backup "/etc/lvm/backup/centos" (seqno 4). VG Attr Ext #PV #LV #SN VSize VFree VG UUID VProfile centos wz--n- 4.00m 1 3 0 556.66g 4.00m WTOf0a-fVj9-lNK2-AJOU-Q4nA-xuVk-H9AYi4 centos wz--n- 4.00m 2 3 0 <557.79g 4.00m gEVmfo-SGj8-B3Ij-9O3U-jd3a-TftX-OMVfY6 |
以上发现现有系统的LVM和挂载的硬盘（故障系统）的LVM的VG名称重复，有多个root、home的LV
2.通过vg的uuid改名
如果通过VG名称进行变更，会提示报错，需要通过UUID进行改名，其中uuid是通过上面的vgs -v查看
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[root@localhost ~]# vgrename gEVmfo-SGj8-B3Ij-9O3U-jd3a-TftX-OMVfY6 centos01 Processing VG centos because of matching UUID gEVmfo-SGj8-B3Ij-9O3U-jd3a-TftX-OMVfY6 Volume group "gEVmfo-SGj8-B3Ij-9O3U-jd3a-TftX-OMVfY6" successfully renamed to "centos01" |
3.查看lv状态
发现有几个是inactive
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[root@localhost ~]# vgs VG #PV #LV #SN Attr VSize VFree centos 1 3 0 wz--n- 556.66g 4.00m centos01 2 3 0 wz--n- <557.79g 4.00m[root@localhost ~]# lvscan ACTIVE '/dev/centos/swap' [15.56 GiB] inherit ACTIVE '/dev/centos/home' [491.09 GiB] inherit ACTIVE '/dev/centos/root' [50.00 GiB] inherit inactive '/dev/centos01/swap' [11.81 GiB] inherit inactive '/dev/centos01/home' [495.97 GiB] inherit inactive '/dev/centos01/root' [50.00 GiB] inherit |
4.修改vg的属性
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[root@localhost ~]# vgchange -ay /dev/centos01 3 logical volume(s) in volume group "centos01" now active[root@localhost ~]# lvscan ACTIVE '/dev/centos/swap' [15.56 GiB] inherit ACTIVE '/dev/centos/home' [491.09 GiB] inherit ACTIVE '/dev/centos/root' [50.00 GiB] inherit ACTIVE '/dev/centos01/swap' [11.81 GiB] inherit ACTIVE '/dev/centos01/home' [495.97 GiB] inherit ACTIVE '/dev/centos01/root' [50.00 GiB] inherit |
5.挂载目录
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[root@localhost ~]# cd /[root@localhost /]# mkdir centos01-root[root@localhost /]# mkdir centos01-home[root@localhost /]# mount /dev/centos01/root /centos01-root/[root@localhost /]# mount /dev/centos01/home /centos01-home/[root@localhost /]# cd centos01-root[root@localhost centos01-root]# lsbin boot dev etc home lib lib64 media mnt opt proc root run sbin sk srv sys tmp usr var |
通过以上操作，即可恢复文件。
