How to Extend LVM in CentOS 7
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Summary: Learn how to extend Logical Volume Management (LVM) in CentOS 7 using simple commands. Understand the process step-by-step to efficiently manage storage on your Linux system.
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Extending Logical Volume Management (LVM) in CentOS 7 allows you to efficiently manage disk space by resizing logical volumes on-the-fly. This flexibility is crucial for dynamic storage requirements in server environments. Here’s a step-by-step guide on how to extend LVM in CentOS 7:
Step 1: Check Available Space
First, ensure you have unallocated space available on the underlying physical volume. You can check this using the vgs command to display volume group information:
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This command will show the available space in your volume group.
Step 2: Resize the Logical Volume
Identify the logical volume (LV) you want to extend using lvs command:
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Then, extend the logical volume to use the available space. Replace LV_NAME with the name of your logical volume and VG_NAME with your volume group:
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This command will extend the logical volume to utilize all available free space in the volume group.
Step 3: Resize the File System
Next, resize the file system within the logical volume to reflect the increased size. For ext4 file systems, use resize2fs:
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For XFS file systems, use xfs_growfs:
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Step 4: Verify the Extension
Confirm that the logical volume has been successfully extended by checking its size with the lvs command again:
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You should see the increased size of your logical volume reflecting the extension.
Conclusion
By following these steps, you can extend LVM in CentOS 7 to effectively manage your storage needs without disrupting your system. Remember to always back up your data before performing any disk operations to prevent data loss.
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