# lvm 볼륨 확장 및 파일시스템 용량 확장 작업

<table border="1" id="bkmrk-perplexity%EC%97%90%EC%84%9C-%EC%83%9D%EC%84%B1%ED%95%9C-ai%EC%9D%B4" style="border-collapse: collapse; width: 100%;"><colgroup><col style="width: 99.8785%;"></col></colgroup><tbody><tr><td>[![image.png](http://igoni.kr/uploads/images/gallery/2026-01/scaled-1680-/H3Timage.png)](http://igoni.kr/uploads/images/gallery/2026-01/H3Timage.png)

</td></tr><tr><td class="align-right">perplexity에서 생성한 AI이미지</td></tr></tbody></table>

xfs로 만들어진 경로의 데이터 사용량 증가하고 있어 추가로 디스크 장착하여 용량 확장하려고 합니다.

#### 사전정보

1. 현재 알람이 발생한 디스크 사용량 정보  
    ```bash
    $>  df -Th /data
    Filesystem                        Type  Size  Used Avail Use% Mounted on
    /dev/mapper/content_vg-content_lv xfs   3.6T  3.3T  346G  91% /data
    
    ```
    
    흠.. 3.6T 디스크인데 3.3T사용하고 있어서 총 사용율 91%네요. ㅠ^ㅠ
2. 굴러다니는 디스크 500G짜리 를 하나 더 붙였습니다.  
    ```bash
    $>  fdisk -l 
    ...
    Disk /dev/sdc: 500 GiB, 536870912000 bytes, 1048576000 sectors
    Units: sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    
    ```
3. vg 이름은 content\_vg, lv 이름은 content\_lv로 구성이 되어 있어요.

#### lvm 볼륨 확장

1. sdc 디스크를 pv 구성해줍니다. (저는 디스크 전체를 lvm으로 사용할꺼라 따로 파티션을 나누진 않았어요)  
    ```bash
    $>  pvcreate /dev/sdc
      Physical volume "/dev/sdc" successfully created.
    
    ```
2. pv 정보 확인 
    1. 확장 후  
        ```bash
        $> pvdisplay 
          --- Physical volume ---
          PV Name               /dev/sdb
          VG Name               content_vg
          PV Size               <3.64 TiB / not usable <1.72 MiB
          Allocatable           yes (but full)
          PE Size               4.00 MiB
          Total PE              953479
          Free PE               0
          Allocated PE          953479
          PV UUID               QnstsS-xBJ0-Qv0l-RFan-SgaA-z3Fg-RJrZK8
        ```
    2. 확장 전  
        ```bash
        $> pvdisplay 
          --- Physical volume ---
          PV Name               /dev/sdb
          VG Name               content_vg
          PV Size               <3.64 TiB / not usable <1.72 MiB
          Allocatable           yes (but full)
          PE Size               4.00 MiB
          Total PE              953479
          Free PE               0
          Allocated PE          953479
          PV UUID               QnstsS-xBJ0-Qv0l-RFan-SgaA-z3Fg-RJrZK8
           
          --- Physical volume ---
          PV Name               /dev/sdc
          VG Name               content_vg
          PV Size               500.00 GiB / not usable 4.00 MiB
          Allocatable           yes (but full)
          PE Size               4.00 MiB
          Total PE              127999
          Free PE               0
          Allocated PE          127999
          PV UUID               Bsm9b5-DZTB-2iWr-6RH0-6uIy-canP-SOhMeC
        
        ```
    3. Volume Group 확장  
        ```bash
        $> vgextend content_vg /dev/sdc 
          Volume group "content_vg" successfully extended
        
        ```
        
        
        1. 확장 전  
            ```bash
            $> vgdisplay 
              --- Volume group ---
              VG Name               content_vg
              System ID             
              Format                lvm2
              Metadata Areas        1
              Metadata Sequence No  5
              VG Access             read/write
              VG Status             resizable
              MAX LV                0
              Cur LV                1
              Open LV               1
              Max PV                0
              Cur PV                1
              Act PV                1
              VG Size               <3.64 TiB
              PE Size               4.00 MiB
              Total PE              953479
              Alloc PE / Size       943718 / <3.60 TiB
              Free  PE / Size       9761 / <38.13 GiB
              VG UUID               IiEZ8G-kbcL-l8MD-Ax6m-dWSZ-ZTCd-OvBWff
            
            ```
        2. 확장 후  
            ```bash
            $> vgdisplay 
              --- Volume group ---
              VG Name               content_vg
              System ID             
              Format                lvm2
              Metadata Areas        2
              Metadata Sequence No  6
              VG Access             read/write
              VG Status             resizable
              MAX LV                0
              Cur LV                1
              Open LV               1
              Max PV                0
              Cur PV                2
              Act PV                2
              VG Size               <4.13 TiB
              PE Size               4.00 MiB
              Total PE              1081478
              Alloc PE / Size       943718 / <3.60 TiB
              Free  PE / Size       137760 / 538.12 GiB
              VG UUID               IiEZ8G-kbcL-l8MD-Ax6m-dWSZ-ZTCd-OvBWff
            
            ```
            
            vg Size가 기존 3.64에서 500G를 확장했기 때문에 4.13T로 설정되었어요. lv를 확장하지 않은 상태이기 때문에 Alloc PE가 3.6T, Free PE가 538.12 Gib가 존재하고 있다고 알려주네요.
    4. LV 확장  
        ```bash
        $> lvextend -l +100%FREE /dev/content_vg/content_lv
          Size of logical volume content_vg/content_lv changed from <3.60 TiB (943718 extents) to <4.13 TiB (1081478 extents).
          Logical volume content_vg/content_lv successfully resized.
        
        ```
        
        남은 공간 모두를 사용할꺼라서 100%FREE라는 옵션을 넣어주면 됩니다. 
        1. 확장전  
            ```bash
            $> lvdisplay 
              --- Logical volume ---
              LV Path                /dev/content_vg/content_lv
              LV Name                content_lv
              VG Name                content_vg
              LV UUID                fhIWVB-0zNY-IcfO-qhu2-iNqV-hk73-0Nwl0N
              LV Write Access        read/write
              LV Creation host, time container.igoni.kr, 2023-01-08 17:53:28 +0900
              LV Status              available
              # open                 1
              LV Size                <3.60 TiB
              Current LE             943718
              Segments               1
              Allocation             inherit
              Read ahead sectors     auto
              - currently set to     256
              Block device           253:0
            
            ```
        2. 확장 후  
            ```bash
            $> lvdisplay 
              --- Logical volume ---
              LV Path                /dev/content_vg/content_lv
              LV Name                content_lv
              VG Name                content_vg
              LV UUID                fhIWVB-0zNY-IcfO-qhu2-iNqV-hk73-0Nwl0N
              LV Write Access        read/write
              LV Creation host, time container.igoni.kr, 2023-01-08 17:53:28 +0900
              LV Status              available
              # open                 1
              LV Size                <4.13 TiB
              Current LE             1081478
              Segments               2
              Allocation             inherit
              Read ahead sectors     auto
              - currently set to     256
              Block device           253:0
            
            ```

자, 여기까지 진행되었으면 lvm 볼륨을 확장하는것까지 되었고요, 이제 파일시스템 확장을 할 껍니다. 여기까지만 진행되었다면, df -h 쳐도 용량이 늘진 않았어요..

1. 파일시스템 확장  
    ```bash
    $> xfs_growfs -d /dev/content_vg/content_lv
    meta-data=/dev/mapper/content_vg-content_lv isize=512    agcount=4, agsize=241591808 blks
             =                       sectsz=512   attr=2, projid32bit=1
             =                       crc=1        finobt=1, sparse=1, rmapbt=0
             =                       reflink=1    bigtime=0 inobtcount=0
    data     =                       bsize=4096   blocks=966367232, imaxpct=5
             =                       sunit=0      swidth=0 blks
    naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
    log      =internal log           bsize=4096   blocks=471859, version=2
             =                       sectsz=512   sunit=0 blks, lazy-count=1
    realtime =none                   extsz=4096   blocks=0, rtextents=0
    data blocks changed from 966367232 to 1107433472
    
    ```
2. 파일시스템 용량 확장 확인 (3.6T -&gt; 4.2T로 용량 증설)  
    ```bash
    $> df -Th /data
    Filesystem                        Type  Size  Used Avail Use% Mounted on
    /dev/mapper/content_vg-content_lv xfs   4.2T  3.3T  881G  80% /data
    
    ```

##### Reference

- [https://m.blog.naver.com/hanajava/220779211465](https://m.blog.naver.com/hanajava/220779211465)
- [https://devinegrace.tistory.com/40](https://devinegrace.tistory.com/40)
- [https://access.redhat.com/documentation/ko-kr/red\_hat\_enterprise\_linux/9/html/managing\_file\_systems/assembly\_increasing-the-size-of-an-xfs-file-system\_managing-file-systems](https://access.redhat.com/documentation/ko-kr/red_hat_enterprise_linux/9/html/managing_file_systems/assembly_increasing-the-size-of-an-xfs-file-system_managing-file-systems)
-