Like cbr in VxVM, LVM has also backup in /etc/lvm/archive/, so if you accidentally remove VG, or VG got destroyed. you can try following procedure.

Note: better do disk2disk copy before doing following. No grantee for your data.

[[email protected]:~]# cd /etc/lvm/archive/

[[email protected]:/etc/lvm/archive]# ls -lart .

total 36

-rw——- 1 root root 919 Oct 22 13:34 VG-data_00000-1897227548.vg

-rw——- 1 root root 923 Oct 22 13:51 VG-data_00001-659586034.vg

-rw——- 1 root root 1365 Oct 23 11:00 VG-data_00002-387427799.vg

-rw——- 1 root root 922 Oct 23 11:00 VG-data_00003-963150977.vg

-rw——- 1 root root 1360 Oct 23 11:27 VG-data_00004-1064511230.vg

-rw——- 1 root root 1782 Oct 23 12:53 VG-data_00005-1898800676.vg

drwxr-xr-x. 6 root root 4096 Jan 29 10:00 ..

-rw——- 1 root root 2189 Feb 26 09:44 VG-data_00006-1747892781.vg

drwx——. 2 root root 4096 Feb 26 09:44 .

[[email protected]:/etc/lvm/archive]# sudo vgcfgrestore -f /etc/lvm/archive/VG-data_00006-1747892781.vg –verbose VG-data

DEGRADED MODE. Incomplete RAID LVs will be processed.

Restored volume group VG-data

[[email protected]:/etc/lvm/archive]# lvdisplay

— Logical volume —

LV Path /dev/VG-data/hdfs

LV Name hdfs

VG Name VG-data

LV UUID qbgsQq-yOOh-fHyt-XXXq-hFpU-2vfH-h6xGPb

LV Write Access read/write

LV Creation host, time mytesthost.rm.symbiosys.com.cn, 2014-10-23 11:00:49 +0800

LV Status NOT available

LV Size 50.00 GiB

Current LE 12800

Segments 1

Allocation inherit

Read ahead sectors auto

— Logical volume —

LV Path /dev/VG-data/solr

LV Name solr

VG Name VG-data

LV UUID r2qSiu-vJHT-LCXZ-QyyS-J2Py-ywyv-79ivsk

LV Write Access read/write

LV Creation host, time mytesthost.rm.symbiosys.com.cn, 2014-10-23 11:27:46 +0800

LV Status NOT available

LV Size 10.00 GiB

Current LE 2560

Segments 1

Allocation inherit

Read ahead sectors auto

— Logical volume —

LV Path /dev/VG-data/mongodb

LV Name mongodb

VG Name VG-data

LV UUID z1w1dY-lM63-EfjU-W21o-cAr6-keGd-j3lqYy

LV Write Access read/write

LV Creation host, time mytesthost.rm.symbiosys.com.cn, 2014-10-23 12:53:15 +0800

LV Status NOT available

LV Size 20.00 GiB

Current LE 5120

Segments 1

Allocation inherit

Read ahead sectors auto

[[email protected]:/etc/lvm/archive]# vgs

VG #PV #LV #SN Attr VSize VFree

VG-data 1 3 0 wz–n- 100.00g 20.00g

[[email protected]:/etc/lvm/archive]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/xvda1 20G 3.8G 15G 20% /

tmpfs 3.9G 0 3.9G 0% /dev/shm

[[email protected]:/etc/lvm/archive]# vgchange -ay /dev/VG-data

3 logical volume(s) in volume group “VG-data” now active

[[email protected]:/etc/lvm/archive]# mount /var/lib/mongodb/

[[email protected]:/etc/lvm/archive]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/xvda1 20G 3.8G 15G 20% /

tmpfs 3.9G 0 3.9G 0% /dev/shm

/dev/mapper/VG–data-mongodb

20G 9.0G 9.7G 48% /var/lib/mongodb

[[email protected]:/etc/lvm/archive]#