Activation of logical volume is prohibited while logical volume _tmeta is active. (500)

Activation of logical volume is prohibited while logical volume _tmeta is active. (500)

Question
How do you solve the error in Proxmox that says "Activation of logical volume  is prohibited while logical volume _tmeta is active. (500)"
                I get this error
Configuration setting "thin_check_options" invalid. It's not part of any section.
Answer
This is what solved this issue.

1. First you need to comment out the section that says  thin_check_options=["-q","--skip-mappings]
    by using nano 
   
     nano /etc/lvm/lvm.conf

2. Deactivate the Volume Group if that is not what should be activated
    
    sudo lvchange -an /dev/volumeGroup/vm-136-disk-0

3. Then run the following command.
    nano /etc/udev/udev.conf

4. Then Reboot

Reference
https
//forum.proxmox.com/threads/local-lvm-not-available-after-kernel-update-on-pve-7.97406/page-3#post-558890

Other Notes from chat bot

____________________________________

The error message you're encountering typically indicates an issue with activating a logical volume due to conflicts with another logical volume that's already active. Here's a general approach to solve it

1. **Check the status of logical volumes**
Run `lvdisplay` or `lvs` command to see the current status of logical volumes. Look for any LVs that are active.

2. **Identify conflicting logical volumes**
Pay attention to the logical volume mentioned in the error message (`_tmeta` in your case) and any other logical volumes that are active.

3. **Deactivate conflicting logical volumes**
If possible, deactivate the conflicting logical volume(s) using the `lvchange -an` command followed by the logical volume name. For example

   

   sudo lvchange -an /dev/volume_group_name/logical_volume_name
   

4. **Activate the desired logical volume**
Once the conflicting logical volume(s) are deactivated, try activating the logical volume you originally intended to activate.

5. **Check for dependencies**
Sometimes logical volumes have dependencies on each other. Ensure that activating or deactivating one logical volume does not break the functionality of others.

6. **Review configuration**
If you're unsure about the dependencies or configuration, review the logical volume configuration files (usually located in `/etc/lvm` or `/etc/lvm.conf`) to understand the setup better.

7. **Error logs**
Check system logs (`/var/log/messages`, `/var/log/syslog`, etc.) for any additional error messages or clues that might help diagnose the issue further.

8. **Consult documentation**
If you're still stuck, refer to the documentation of the specific logical volume manager you're using (e.g., LVM2 for Linux) for more detailed troubleshooting steps or consider seeking help from relevant forums or communities.

Remember to exercise caution when making changes to logical volumes, especially if they contain critical data. It's always a good idea to have backups before performing any potentially destructive operations.

________________________________

Activation of logical volume is prohibited while logical volume _tmeta is active. (500)

Title
Understanding and Resolving the "Activation of Logical Volume is Prohibited While Logical Volume _tmeta is Active" Error in Linux

Introduction

The "Activation of logical volume is prohibited while logical volume _tmeta is active" error is a common issue encountered by Linux users during the management of Logical Volumes Manager (LVM). This error message can be quite frustrating as it prevents users from performing essential tasks such as extending or modifying their logical volumes. In this blog post, we will delve deeper into this issue, discuss its causes, and provide potential solutions.

Understanding Logical Volumes Manager (LVM)

Before we dive into the error message itself, let's first discuss what Logical Volumes Manager (LVM) is and how it works. LVM is a disk management tool that allows users to manage their storage at a logical level rather than a physical one. It enables users to create logical volumes from physical volumes, which can then be used to store filesystems or other logical volumes. LVM provides several advantages over traditional partitioning methods, such as

- Flexibility
LVM allows users to add or remove physical volumes from logical volumes without having to repartition the entire disk.

- Efficiency
LVM allows users to allocate space dynamically, reducing wasted space.

- Redundancy
LVM supports snapshotting and thin provisioning, which can help improve data redundancy and availability.

Causes of "Activation of Logical Volume is Prohibited While Logical Volume _tmeta is Active" Error

The "Activation of logical volume is prohibited while logical volume _tmeta is active" error occurs when LVM detects that there is an inconsistency between the metadata of two logical volumes
the logical volume that you want to activate and the _tmeta logical volume. The _tmeta logical volume stores metadata for the physical volume that backs up the logical volume in question.

When LVM detects an inconsistency between these two volumes, it prevents users from activating or modifying the logical volume to protect against data loss or corruption. There are several reasons why this inconsistency might occur

- Power failure or unexpected system shutdown
If there is a power failure or unexpected system shutdown during an LVM operation, it can result in metadata inconsistencies.

- Human error
Users can accidentally cause metadata inconsistencies by performing conflicting LVM operations on different logical volumes or physical volumes.

Solutions

Fortunately, there are several solutions to resolve this issue. In this section, we will discuss some common methods to resolve the "Activation of logical volume is prohibited while logical volume _tmeta is active" error.

Method 1
Checking File System Consistency

The first solution is to check the file system consistency of the logical volume in question using the fsck command. To do this, follow these steps

1. Identify the logical volume name using the lvdisplay command

bash
sudo pvdisplay
lvdisplay

2. Identify the file system type and mount point of the logical volume

bash
sudo blkid /dev/

3. Unmount the file system

bash
sudo umount /mnt/

4. Check the file system consistency using fsck

bash
sudo fsck /dev/

If fsck reports any errors, try to repair them using the suggested options.

Method 2
Repairing Logical Volume Metadata

If checking file system consistency does not resolve the issue, you may need to repair the logical volume metadata using the lvm2 vgchange command. To do this, follow these steps

1. Identify the volume group name using the vgdisplay command

bash
sudo vgdisplay

2. Deactivate the logical volume

bash
sudo vgchange -a n /

3. Resync the metadata using the pvcreate and vgcreate commands

bash

sudo pvcreate /dev/

sudo vgcreate /dev/

sudo vgextend