Mounting LVM volume after reinstalling Linux

 

Today, I reinstalled my Linux box with latest Redhat version, but I failed to mount the LVS from two application VGs, which are from SAN. Below are the steps how i resolved the issue.

For listing and checking the status of available SAN disks (pv-physical volumes). Here, all three disk are visible including vlgroup00 (its is the OS volume)

[root@test3 ]# pvs
  PV         VG         Fmt  Attr PSize   PFree
  /dev/sda2  VolGroup00 lvm2 a-    29.88G       0
  /dev/sdb1  VolBsl     lvm2 a-    69.97G    2.72G
  /dev/sdc   OraEai     lvm2 a-   170.00G 1020.00M

Below command lists the existing volume groups (VGs) related each disk. Notice the status “Found exported volume group “ in below output, which means, VGs are not exported. Let us import it by next steps. 
[root@test3 ]# vgscan
  Reading all physical volumes.  This may take a while...
  Found exported volume group "OraEai" using metadata type lvm2
  Found exported volume group "VolBsl" using metadata type lvm2
  Found volume group "VolGroup00" using metadata type lvm2

Now let us import it.
[root@test3 ]# vgimport OraEai
  Volume group "OraEai" successfully imported
[root@sdl003 mapper]# vgimport VolBsl
  Volume group "VolBsl" successfully imported

Volumes are imported. see the status below.

[root@test3 ]# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "OraEai" using metadata type lvm2
  Found volume group "VolBsl" using metadata type lvm2
  Found volume group "VolGroup00" using metadata type lvm2

Now let us see the status of logical volumes (LVs) all the volume from above two VGs are inactive. For mounting a volume, it must be ACTIVE status.
[root@test3 ]# lvscan
  inactive          '/dev/OraEai/LvOracle' [10.00 GB] inherit
  inactive          '/dev/OraEai/LvOraEai' [149.00 GB] inherit
  inactive          '/dev/OraEai/LvOraArchive' [10.00 GB] inherit
  inactive          '/dev/VolBsl/LogVol02' [48.81 GB] inherit
  inactive          '/dev/VolBsl/LogVol00' [4.53 GB] inherit
  inactive          '/dev/VolBsl/LogVol01' [3.91 GB] inherit
  inactive          '/dev/VolBsl/home_wbimbprd' [5.00 GB] inherit
  inactive          '/dev/VolBsl/var_mqsi' [5.00 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [25.97 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [3.91 GB] inherit

Let us activate all volume using lvchange -ay lvname. Here is the single command loop to do the same for all inactive LVs .
[root@test3 ]# for i in `lvscan|grep inactive|awk -F\' {'print $2'}`; do lvchange -ay $i; done
[root@test3 ]# lvscan
  ACTIVE            '/dev/OraEai/LvOracle' [10.00 GB] inherit
  ACTIVE            '/dev/OraEai/LvOraEai' [149.00 GB] inherit
  ACTIVE            '/dev/OraEai/LvOraArchive' [10.00 GB] inherit
  ACTIVE            '/dev/VolBsl/LogVol02' [48.81 GB] inherit
  ACTIVE            '/dev/VolBsl/LogVol00' [4.53 GB] inherit
  ACTIVE            '/dev/VolBsl/LogVol01' [3.91 GB] inherit
  ACTIVE            '/dev/VolBsl/home_wbimbprd' [5.00 GB] inherit
  ACTIVE            '/dev/VolBsl/var_mqsi' [5.00 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol00' [25.97 GB] inherit
  ACTIVE            '/dev/VolGroup00/LogVol01' [3.91 GB] inherit

Great…, Now I am able to mount the volume..

[root@test3 ]# mount /dev/mapper/OraEai-LvOraArchive /oracle/eaitest/archive