更改VG UUID

1.首先需要更改vg uuid的lvm不能处于激活状态

[root@localhost ~]# vgimportclone --basevgname centos /dev/sda2
  Device /dev/sda2 has active LVs, deactivate first.

2.使用vgscan得到物理磁盘的路径

[root@localhost ~]# pvscan
  PV /dev/sdb2   VG vg011           lvm2 [<499.00 GiB / 4.00 MiB free]
  PV /dev/sda2   VG centos          lvm2 [<499.00 GiB / 4.00 MiB free]
  Total: 2 [997.99 GiB] / in use: 2 [997.99 GiB] / in no VG: 0 [0   ]

3.先用vgrename给磁盘重新改一个vgname，再使用vgimportclone命令为需要更改的磁盘重新生成vg uuid

[root@localhost ~]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <499.00 GiB
  PE Size               4.00 MiB
  Total PE              127743
  Alloc PE / Size       127742 / 498.99 GiB
  Free  PE / Size       1 / 4.00 MiB
  VG UUID               dEgXW8-PsYd-1t6H-JNu5-sgcg-2K3l-EwXMtc

  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <499.00 GiB
  PE Size               4.00 MiB
  Total PE              127743
  Alloc PE / Size       127742 / 498.99 GiB
  Free  PE / Size       1 / 4.00 MiB
  VG UUID               YIk6Ds-MsxE-mwek-1x3S-uzdT-lxUo-VFxnGs

[root@localhost ~]# vgrename dEgXW8-PsYd-1t6H-JNu5-sgcg-2K3l-EwXMtc vg01
  Processing VG centos because of matching UUID dEgXW8-PsYd-1t6H-JNu5-sgcg-2K3l-EwXMtc
  Volume group "dEgXW8-PsYd-1t6H-JNu5-sgcg-2K3l-EwXMtc" successfully renamed to "vg01"

[root@localhost ~]# vgimportclone --basevgname vg01 /dev/sdb2
[root@localhost ~]# vgdisplay
  --- Volume group ---
  VG Name               vg011
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <499.00 GiB
  PE Size               4.00 MiB
  Total PE              127743
  Alloc PE / Size       127742 / 498.99 GiB
  Free  PE / Size       1 / 4.00 MiB
  VG UUID               36WT7t-8KVJ-dGjV-cmfA-qV6W-Wqgp-YSw2NG

  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  4
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <499.00 GiB
  PE Size               4.00 MiB
  Total PE              127743
  Alloc PE / Size       127742 / 498.99 GiB
  Free  PE / Size       1 / 4.00 MiB
  VG UUID               YIk6Ds-MsxE-mwek-1x3S-uzdT-lxUo-VFxnGs

4.最后激活lvm并挂载到挂载点就可以拷数据了