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自动选题[tech]: 20200918 How to Extend/Increase LVM’s (Logical Volume Resize) in Linux
2026-08-23 04:03:29 +08:00 · 2020-09-18 11:16:04 +08:00
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+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (How to Extend/Increase LVM’s (Logical Volume Resize) in Linux)
+[#]: via: (https://www.2daygeek.com/extend-increase-resize-lvm-logical-volume-in-linux/)
+[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
+
+How to Extend/Increase LVM’s (Logical Volume Resize) in Linux
+======
+
+Expanding the logical volume is extremely easy, it takes very few steps and can be done online without unmounting a certain logical volume.
+
+The main purpose of LVM is flexible disk management, which allows you to easily resize, extend and reduce the logical volume size when you need it.
+
+If you are new to Logical Volume Management (LVM), I suggest you start with our previous article.
+
+  * **Part-1: [How to Create/Configure LVM (Logical Volume Management) in Linux][1]**
+
+
+
+![][2]
+
+Expanding the logical volume involves the below steps.
+
+  * Check if you have sufficient unallocated disk space in the volume group where the LV was residing.
+  * If yes, you can use that space to extend the logical volume.
+  * If not, add new disks or LUNs to your system.
+  * Convert a physical disk as a physical volume (PV).
+  * Extend the Volume Group
+  * Increase the logical Volume
+  * Grow the filesystem
+  * Check the extended filesystem size
+
+
+
+### How to Create LVM Physical Volumes
+
+Create LVM physical volumes with the pvcreate command.
+
+Once the disk is detected in the OS, use the pvcreate command to initialize the LVM PV (Physical Volumes).
+
+```
+# pvcreate /dev/sdc
+Physical volume "/dev/sdc" successfully created
+```
+
+**Make a note:**
+
+  * The above command erases any data on the given disk /dev/sdc.
+  * Physical disk can be added directly into the LVM PV instead of the disk partition.
+
+
+
+Use the pvdisplay command to display the PVs you have created.
+
+```
+# pvdisplay /dev/sdc
+
+"/dev/sdc" is a new physical volume of "10.00 GiB"
+--- NEW Physical volume ---
+PV Name               /dev/sdc
+VG Name
+PV Size               10.00 GiB
+Allocatable           NO
+PE Size               0
+Total PE              0
+Free PE               0
+Allocated PE          0
+PV UUID               69d9dd18-36be-4631-9ebb-78f05fe3217f
+```
+
+### How to Extend the Volume Group
+
+Use the following command to add a new physical volume to the existing volume group.
+
+```
+# vgextend vg01 /dev/sdc
+Volume group "vg01" successfully extended
+```
+
+Use the vgdisplay command to display the PVs you have created.
+
+```
+# vgdisplay vg01
+--- Volume group ---
+VG Name              vg01
+System ID
+Format               lvm2
+Metadata Areas       2
+Metadata Sequence No 1
+VG Access            read/write
+VG Status            resizable
+MAX LV               0
+Cur LV               0
+Open LV              0
+Max PV               0
+Cur PV               2
+Act PV               2
+VG Size              14.99 GiB
+PE Size              4.00 MiB
+Total PE             3840
+Alloc PE / Size      1280 / 4.99
+Free PE / Size       2560 / 9.99 GiB
+VG UUID              d17e3c31-e2c9-4f11-809c-94a549bc43b7
+```
+
+### How to Extend the Logical Volume
+
+Use the following command to increase the existing logical volume.
+
+**Common syntax for logical volume extension (lvextend).**
+
+```
+lvextend [Additional space to be added] [Existing Logical Volume Name]
+```
+
+Use the below command to increase the existing logical volume additionally to 10GB.
+
+```
+# lvextend -L +10G /dev/mapper/vg01-lv002
+Rounding size to boundary between physical extents: 5.90 GiB
+Size of logical volume vg01/lv002 changed from 5.00 GiB (1280 extents) to 15.00 GiB (3840 extents).
+Logical volume var successfully resized
+```
+
+To extend logical volume using PE size’s.
+
+```
+# lvextend -l +2560 /dev/mapper/vg01-lv002
+```
+
+To extend the logical volume using percentage (%), use the following command.
+
+```
+# lvextend -l +40%FREE /dev/mapper/vg01-lv002
+```
+
+Now, the logical volume is extended and you need to resize the file system to extend the space inside the logical volume.
+
+For an ext3 and ext4 based file system, run the following command.
+
+```
+# resize2fs /dev/mapper/vg01-lv002
+```
+
+For the xfs file system, use the following command.
+
+```
+# xfs_growfs /dev/mapper/vg01-lv002
+```
+
+Use the **[df command][3]** to view the file system size.
+
+```
+# df -h /lvmtest1
+Filesystem Size Used Avail Use% Mounted on
+/dev/mapper/vg01-lv002 15360M 34M 15326M 4% /lvmtest1
+```
+
+--------------------------------------------------------------------------------
+
+via: https://www.2daygeek.com/extend-increase-resize-lvm-logical-volume-in-linux/
+
+作者：[Magesh Maruthamuthu][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://www.2daygeek.com/author/magesh/
+[b]: https://github.com/lujun9972
+[1]: https://www.2daygeek.com/create-lvm-storage-logical-volume-manager-in-linux/
+[2]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
+[3]: https://www.2daygeek.com/linux-check-disk-space-usage-df-command/