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+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (How to Remove Physical Volume from a Volume Group in LVM)
+[#]: via: (https://www.2daygeek.com/linux-remove-delete-physical-volume-pv-from-volume-group-vg-in-lvm/)
+[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
+
+How to Remove Physical Volume from a Volume Group in LVM
+======
+
+If a device is no longer need for use by LVM, you can use the vgreduce command to remove physical volumes from a volume group.
+
+The Vgreduce command shrinks the capacity of a volume group by removing a physical volume.
+
+But make sure that the physical volume is not used by any logical volumes using the pvdisplay command.
+
+If the physical volume is still being used, you must transfer the data to another physical volume using the pvmove command.
+
+Once the data is moved, it can be removed from the volume group.
+
+Finally use the pvremove command to remove the LVM label and LVM metadata on the empty physical volume.
+
+  * **Part-1: [How to Create/Configure LVM (Logical Volume Management) in Linux][1]**
+  * **Part-2: [How to Extend/Increase LVM’s (Logical Volume Resize) in Linux][2]**
+  * **Part-3: [How to Reduce/Shrink LVM’s (Logical Volume Resize) in Linux][3]**
+
+
+
+![][4]
+
+### 1) Moving Extents to Existing Physical Volumes
+
+Use the pvs command to check if the desired physical volume (we plan to remove the **“/dev/sdb1”** disk in LVM) is used or not.
+
+```
+# pvs -o+pv_used
+
+PV VG Fmt Attr PSize PFree Used
+/dev/sda1 myvg lvm2 a- 75.00G 14.00G 61.00G
+/dev/sdb1 myvg lvm2 a- 50.00G 45.00G 5.00G
+/dev/sdc1 myvg lvm2 a- 17.15G 12.15G 5.00G
+```
+
+If this is used, check to see if there are enough free extents on the other physics volumes in the volume group.
+
+If so, you can run the pvmove command on the device you want to remove. Extents will be distributed to other devices.
+
+```
+# pvmove /dev/sdb1
+
+/dev/sdb1: Moved: 2.0%
+…
+/dev/sdb1: Moved: 79.2%
+…
+/dev/sdb1: Moved: 100.0%
+```
+
+When the pvmove command is complete. Re-use the pvs command to check whether the physics volume is free or not.
+
+```
+# pvs -o+pv_used
+
+PV VG Fmt Attr PSize PFree Used
+/dev/sda1 myvg lvm2 a- 75.00G 9.00G 66.00G
+/dev/sdb1 myvg lvm2 a- 50.00G 50.00G 0
+/dev/sdc1 myvg lvm2 a- 17.15G 12.15G 5.00G
+```
+
+If it’s free, use the vgreduce command to remove the physical volume /dev/sdb1 from the volume group.
+
+```
+# vgreduce myvg /dev/sdb1
+Removed "/dev/sdb1" from volume group "myvg"
+```
+
+Finally, run the pvremove command to remove the disk from the LVM configuration. Now, the disk is completely removed from the LVM and can be used for other purposes.
+
+```
+# pvremove /dev/sdb1
+Labels on physical volume "/dev/sdb1" successfully wiped.
+```
+
+### 2) Moving Extents to a New Disk
+
+If you don’t have enough free extents on the other physics volumes in the volume group. Add new physical volume using the steps below.
+
+Request new LUNs from the storage team. Once this is allocated, run the following commands to **[discover newly added LUNs or disks in Linux][5]**.
+
+```
+# ls /sys/class/scsi_host
+host0
+```
+
+```
+# echo "- - -" > /sys/class/scsi_host/host0/scan
+```
+
+```
+# fdisk -l
+```
+
+Once the disk is detected in the OS, use the pvcreate command to create the physical volume.
+
+```
+# pvcreate /dev/sdd1
+Physical volume "/dev/sdd1" successfully created
+```
+
+Use the following command to add new physical volume /dev/sdd1 to the existing volume group vg01.
+
+```
+# vgextend vg01 /dev/sdd1
+Volume group "vg01" successfully extended
+```
+
+Now, use the pvs command to see the new disk **“/dev/sdd1”** that you have added.
+
+```
+# pvs -o+pv_used
+
+PV VG Fmt Attr PSize PFree Used
+/dev/sda1 myvg lvm2 a- 75.00G 14.00G 61.00G
+/dev/sdb1 myvg lvm2 a- 50.00G 0 50.00G
+/dev/sdc1 myvg lvm2 a- 17.15G 12.15G 5.00G
+/dev/sdd1 myvg lvm2 a- 60.00G 60.00G 0
+```
+
+Use the pvmove command to move the data from /dev/sdb1 to /dev/sdd1.
+
+```
+# pvmove /dev/sdb1 /dev/sdd1
+
+/dev/sdb1: Moved: 10.0%
+…
+/dev/sdb1: Moved: 79.7%
+…
+/dev/sdb1: Moved: 100.0%
+```
+
+After the data is moved to the new disk. Re-use the pvs command to check whether the physics volume is free.
+
+```
+# pvs -o+pv_used
+
+PV VG Fmt Attr PSize PFree Used
+/dev/sda1 myvg lvm2 a- 75.00G 14.00G 61.00G
+/dev/sdb1 myvg lvm2 a- 50.00G 50.00G 0
+/dev/sdc1 myvg lvm2 a- 17.15G 12.15G 5.00G
+/dev/sdd1 myvg lvm2 a- 60.00G 10.00G 50.00G
+```
+
+If it’s free, use the vgreduce command to remove the physical volume /dev/sdb1 from the volume group.
+
+```
+# vgreduce myvg /dev/sdb1
+Removed "/dev/sdb1" from volume group "myvg"
+```
+
+Finally, run the pvremove command to remove the disk from the LVM configuration. Now, the disk is completely removed from the LVM and can be used for other purposes.
+
+```
+# pvremove /dev/sdb1
+Labels on physical volume "/dev/sdb1" successfully wiped.
+```
+
+--------------------------------------------------------------------------------
+
+via: https://www.2daygeek.com/linux-remove-delete-physical-volume-pv-from-volume-group-vg-in-lvm/
+
+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]: https://www.2daygeek.com/extend-increase-resize-lvm-logical-volume-in-linux/
+[3]: https://www.2daygeek.com/reduce-shrink-decrease-resize-lvm-logical-volume-in-linux/
+[4]: data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
+[5]: https://www.2daygeek.com/scan-detect-luns-scsi-disks-on-redhat-centos-oracle-linux/