lvm2_member disk partition
2026-03-04系统崩溃，用live盘挂载时候发现分区是lvm2_member
1、[root@server79 network-scripts]# pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 cs lvm2 a-- 100.00g 4.00m
--- Logical volume ---
LV Path /dev/cs/root
LV Name root
VG Name cs
LV UUID S1zXwm-Yy9F-sCHO-h2Qd-pdtT-TKDt-uITQbA
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2022-09-09 20:00:12 +0800
LV Status NOT available
LV Size 100.00 GiB
Current LE 25600
Segments 1
Allocation inherit
Read ahead sectors auto
2、[root@server79 ~]# vgs
VG #PV #LV #SN Attr VSize VFree
ceph-134265c9-10da-4566-9ad0-fdce4bf9c16e 1 1 0 wz--n- <7.28t 0
ceph-293c7757-363e-4da6-b2c2-2e37c6fad529 1 1 0 wz--n- <7.28t 0
ceph-3c141bf9-dd87-4a36-9065-8ae4fba0158f 1 1 0 wz--n- <7.28t 0
ceph-4f2d5949-8f2f-4507-8f8f-81a561ea23c1 1 1 0 wz--n- <7.28t 0
ceph-528670f2-eec0-4bcf-ad5e-f3c141d0b842 1 1 0 wz--n- <7.28t 0
ceph-557c57cf-bf9b-41fe-b06c-a7e8cfad2d8f 1 1 0 wz--n- <7.28t 0
ceph-97a6e744-9428-417b-9de2-11aa917d0f76 1 1 0 wz--n- <7.28t 0
ceph-f78c6d6a-180e-492c-b6c9-1f5339569aec 1 1 0 wz--n- <7.28t 0
cs 1 1 0 wz--n- 100.00g 4.00m
3、lvdispaly
4、vgchange -ay cs
5、mount /dev/cs/root /mnt/old_root
6、重命名前确保未激活
sudo vgchange -an cs # 先停用
sudo vgrename cs cs_old
sudo vgchange -ay cs_old # 激活新名字的卷组
7、chroot /mnt/old_root /bin/bash
tar cvpf etc.tar etc
tar cvpf usr.tar usr
tar cvpf var.tar var