linux lvm invalid summary for VG

The error message "invalid summary for VG" in Linux LVM (Logical Volume Manager) typically indicates that the metadata for the Volume Group (VG) is corrupted or inconsistent. This can happen due to various reasons such as disk errors, improper shutdowns, or manual modifications to the LVM configuration.

To resolve this issue, you can try the following steps:

1. Check the integrity of the physical volumes (PVs) in the Volume Group by running the command:

   pvck /dev/sdX
   

   Replace /dev/sdX with the actual device name of the physical volume. Repeat this command for all PVs in the VG.

2. If any errors are found in the PVs, you can attempt to repair them using the pvrepair command:

   pvrepair /dev/sdX
   

   Again, replace /dev/sdX with the appropriate device name.

3. If the PVs are healthy, you can try to repair the Volume Group metadata by running the command:

   vgcfgrestore <VG Name>
   

   Replace <VG Name> with the actual name of the Volume Group.

4. If the above steps do not work, you may need to restore the Volume Group metadata from a backup. This can be done using the vgcfgrestore command with the -f option to specify the backup file.

5. If you do not have a backup, you may need to recreate the Volume Group and restore the data from backups or snapshots.

It is important to note that performing these steps can potentially lead to data loss, so it is recommended to have backups of your important data before attempting any repairs. Additionally, it is advisable to seek assistance from a knowledgeable system administrator or LVM expert if you are unsure about the process.