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  • How to remove logical and physical volume from Volume Group in Linux


    Remove Logical Volume from Volume Group


    NOTE: Make sure the logical volume to be removed is unmounted.

    Syntax:
    # lvremove /path/to/lvm





    Once the logical volume is unmounted run the below command from the terminal
    # lvremove /dev/NewGroup/office
    Do you really want to remove active logical volume office? [y/n]: y
      Logical volume "office" successfully removed
    Verify the changes (As you see "office" logical volume is successfully deleted)

    [root@test2 ~]# lvdisplay
      --- Logical volume ---
      LV Path                /dev/NewGroup/root
      LV Name                root
      VG Name                NewGroup
      LV UUID                52mm9d-feyC-AWVH-NTMC-VwNa-Ns1p-cJc8vJ
      LV Write Access        read/write
      LV Creation host, time test2.example, 2014-03-14 02:37:58 +0530
      LV Status              available
      # open                 1
      LV Size                9.92 GiB
      Current LE             2539
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           253:0

      --- Logical volume ---
      LV Path                /dev/NewGroup/swap
      LV Name                swap
      VG Name                NewGroup
      LV UUID                48hszS-I0uT-Zsxr-jnoY-yEbj-hfBJ-isofU7
      LV Write Access        read/write
      LV Creation host, time test2.example, 2014-03-14 02:38:00 +0530
      LV Status              available
      # open                 1
      LV Size                1.95 GiB
      Current LE             500
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           253:1


    Remove Physical Volume from Volume Group


    Verify the physical volume to be removed
    # vgdisplay -v
        Finding all volume groups
        Finding volume group "VolGroup"
      --- Volume group ---
      VG Name               VolGroup
      System ID
      Format                lvm2
      Metadata Areas        2
      Metadata Sequence No  25
      VG Access             read/write
      VG Status             resizable
      MAX LV                0
      Cur LV                2
      Open LV               2
      Max PV                0
      Cur PV                2
      Act PV                2
      VG Size               10.81 GiB
      PE Size               4.00 MiB
      Total PE              2767
      Alloc PE / Size       2265 / 8.85 GiB
      Free  PE / Size       502 / 1.96 GiB
      VG UUID               uH5AP5-b24E-92h7-nL8b-7Bio-fXe3-pstWIW

      --- Logical volume ---
      LV Path                /dev/VolGroup/root
      LV Name                root
      VG Name                VolGroup
      LV UUID                Qn8TnI-TLNm-rl4Y-ORnd-zU3p-2Kj1-ALSLAg
      LV Write Access        read/write
      LV Creation host, time ,
      LV Status              available
      # open                 1
      LV Size                6.85 GiB
      Current LE             1753
      Segments               2
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           253:0

      --- Logical volume ---
      LV Path                /dev/VolGroup/swap
      LV Name                swap
      VG Name                VolGroup
      LV UUID                M1ucwx-2sjb-o9Q4-a2td-aPvi-FO1C-ggHuPn
      LV Write Access        read/write
      LV Creation host, time ,
      LV Status              available
      # open                 1
      LV Size                2.00 GiB
      Current LE             512
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           253:1

      --- Physical volumes ---
      PV Name               /dev/sda2
      PV UUID               uYfzd6-4jh1-YTP7-I3hx-WdSJ-4mTR-HZcdtq
      PV Status             allocatable
      Total PE / Free PE    2509 / 244

      PV Name               /dev/sdb1
      PV UUID               Am341r-9WLV-NgWo-Un0Y-sVLQ-fyXM-0zyDix
      PV Status             allocatable
      Total PE / Free PE    258 / 258

    As you can see my VolGroup contains /dev/sda2 and /dev/sdb1 partition. Let us try to remove /dev/sdb1

    To remove a Physical Volume first we need to remove it from the Volume group using below syntax

    Syntax:
    # vgreduce name_of_vol_grp  path/of/pv
    # vgreduce VolGroup /dev/sdb1
      Removed "/dev/sdb1" from volume group "VolGroup"

    Once reduce from volgroup we can easily remove the PV using below command
    # pvremove /dev/sdb1
      Labels on physical volume "/dev/sdb1" successfully wiped

    I hope I made my self clear. Please let me know your success and failures.

    Related Articles
    How to extend/resize LVM and Volume Group in Red Hat Linux 6
    How to rename Logical Volume and Volume Group in Linux

    Deepak Prasad

    Deepak Prasad is a techie and an author who is still trying to survive in this IT generation with very little knowledge he has on Linux/Unix, VMware, SAN Storage, Automation, networking etc

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    How to remove logical and physical volume from Volume Group in Linux How to remove logical and physical volume from Volume Group in Linux Reviewed by Deepak Prasad on Monday, March 24, 2014 Rating: 5

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