How to remove corrupted PV in Linux OS

Introduction: In a Logical Volume Management (LVM) setup, a corrupted Physical Volume (PV) can lead to data loss and system instability. Fortunately, handling such situations effectively can prevent further damage and restore system integrity. In this article, we'll outline the steps to identify and remove a corrupted PV from your LVM configuration.

Identifying the Corrupted PV:

  1. Utilize pvdisplay or pvs Command:
    • Begin by using the pvdisplay or pvs command to enumerate the PVs present in your system.
    • These commands provide essential information about each PV, aiding in the identification of the corrupted one.

Checking VG Status: 2. Verify Volume Group (VG) Status:

  • After identifying the potentially corrupted PV, it's crucial to assess its impact on the associated Volume Group (VG).
  • Use the vgdisplay command to examine the status of the VG and ascertain whether the corrupted PV remains a member.

Checking for Error Messages: 3. Review System Logs for Error Messages:

  • Error messages and warnings associated with the PV can offer insights into its state and potential corruption.
  • Explore system logs using commands like dmesg and journalctl to identify any pertinent messages related to the PV.

Example Commands:

  • dmesg | grep "PV_NAME": Searches system message logs for occurrences of the PV's name, providing context on potential issues.
  • journalctl -xe: Examines system-wide journal logs, highlighting any errors or warnings pertinent to the PV's status.
-------------------------------------------------
Before proceeding with any operations, ensure that the file system associated with the PV is unmounted. Use the following command:
Unmount the File System
umount <filesystem>

To check space used by the physical volumes.
pvs -o+pv_used

Extend VG
It's required add extra space before removing PV, to extend vg 
> add disk with required space.
>  create PV
pvcreate /dev/sde
> now extend VG, 
vgextend vg_data /dev/sde
Move PV
Now, it’s time to transfer the data from the corrupted PV to the newly added PV. Execute:
pvmove /dev/sdc /dev/sde
Ensure that the PV space is correctly allocated and then reduce the VG space by removing the corrupted PV. Utilize the following commands:
pvs -o+pv_used
vgreduce vg_data /dev/sdc
It's done, now you can mount your file system, verify it. 
mount /dev/vg_data/lv_data /Lilli/LVM/
After confirming the successful mount, you can safely remove the corrupted PV from the VG as it is no longer needed. 
That's it....

Please provide your feedback below.

Comments

Post a Comment

Popular posts from this blog

Awk command with simple examples

Image
Now, we are going to learn very interesting and Most important  in  Linux Why late lets know about Awk command,one of the mostly used command in scripting. awk command used to manipulate data | using this AWK command we can generate specified reports as per our requirement. Syntax : awk ‘BEGIN {start_action} {action} END {stop_action}’ filename let me explain about awk command with simple examples Example 1: How to print entire   data of the file cat filename | awk '{print}' cat filename | awk '{print$0}' both " awk '{print}' and  awk '{print$0}'  " used to print entire date Example 2: How to print  very first column cat filename|  awk '{print$1}' awk '{print$1}'  used to print very first column   awk '{print$1}'   used to print second column   Example 3: How to print p attern Matching Technique in Awk. free -m | awk '{/Mem/print}' here, we are matching Mem using  awk '{/Mem/p...
Read more

Learn Linux in Telugu | Linux complete Free Course in Telugu by 7Hills

               Hello, Here we are going to learn complete Linux course freely & Simply way. Why Linux?                   Linux is an heart the operating system,   Based on the Linux Kernel their are different types of Linux flavors available i.e.. RedHat, Centos, Fedora, Mint Debian, Kali, OpenSUSE...etc Features of Linux Open source. Multi-user. Multitasking. Hierarchical file system. Portable. Wide hardware support. No need to worry, we explained each and every topic clearly just click on the below links for watch on Youtube.   1.       Linux outline in Telugu 2.       Linux introduction In Telugu 3.       Linux architecture In Telugu 4.       Linux Directory Structure In Telugu 5.       Linux Basic Commands In Telugu 6.    ...
Read more

rsync Command Examples | rsync Command In Telugu

Image
Hey! Well come back! Here, we are going to learn very useful command rsync. basically rsync is used to sync file system with same structure. It also used to data backup/copy. rsync is free command line utility & In most of the system it available defiantly. We can install rsync utility in debian based system using below command apt-get install rsync We can install rsync utility in redhat based system using below command yum install rsync Below command used to copy files without using option rsync /root/Desktop/original/* /root/Desktop/backup/ Below command used for recursive copy, it means with sub folders. rsync -avhr /root/Desktop/original/* /root/Desktop/backup/ Here     -a is used for archive data.     -v is used for show output.     -h is used for show copied data in MB's,it means human              readable  format. Below command used for include or exclude  rsync -avz --include ...
Read more