Oracle Linux 9 온라인 디스크 증설 방법

OS 환경 : Oracle Linux 9.6 (64bit)

 

방법 : Oracle Linux 9 온라인 디스크 증설 방법

본문에서는 vm과 같은 가상화 환경의 리눅스9에서 디스크를 온라인으로 증설하는 방법에 대해 설명함

/(root) 영역을 기존 92gb에서 추가 100gb를 증가시킬 예정임, 현재 89% 사용중임

참고로 growpart라는 패키지를 사용해서 진행함

 

 

테스트
growpart 패키지 설치

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# dnf install -y cloud-utils-growpart Last metadata expiration check: 0:04:25 ago on Sun 10 May 2026 01:53:21 PM KST. Dependencies resolved. ===========================================================================================================================================================  Package                                     Architecture                  Version                              Repository                            Size =========================================================================================================================================================== Installing:  cloud-utils-growpart                        x86_64                        0.33-1.el9                           ol9_appstream                         38 k   Transaction Summary =========================================================================================================================================================== Install  1 Package   Total download size: 38 k Installed size: 75 k Downloading Packages: cloud-utils-growpart-0.33-1.el9.x86_64.rpm                                                                                  58 kB/s |  38 kB     00:00 ----------------------------------------------------------------------------------------------------------------------------------------------------------- Total                                                                                                                       58 kB/s |  38 kB     00:00 Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction   Preparing        :                                                                                                                                   1/1   Installing       : cloud-utils-growpart-0.33-1.el9.x86_64                                                                                            1/1   Running scriptlet: cloud-utils-growpart-0.33-1.el9.x86_64                                                                                            1/1   Verifying        : cloud-utils-growpart-0.33-1.el9.x86_64                                                                                            1/1   Installed:   cloud-utils-growpart-0.33-1.el9.x86_64   Complete!

설치됨

 

 

디스크 기존 용량 확인

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# df -h Filesystem           Size  Used Avail Use% Mounted on devtmpfs             4.0M     0  4.0M   0% /dev tmpfs                 10G  1.1M   10G   1% /dev/shm tmpfs                2.4G  9.3M  2.4G   1% /run /dev/mapper/ol-root   92G   82G   11G  89% / /dev/sda1            448M  404M   44M  91% /boot tmpfs                1.2G   52K  1.2G   1% /run/user/42 tmpfs                1.2G   36K  1.2G   1% /run/user/0

/(root) 영역을 기존 92gb에서 추가 100gb를 증가시킬 예정임, 현재 89% 사용중임

 

 

vm 설정에서 디스크 크기를 100gb에서 200gb로 변경 후 확인

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# fdisk -l Disk /dev/sda: 100 GiB, 107374182400 bytes, 209715200 sectors Disk model: Virtual disk Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x95bec2cc   Device     Boot   Start       End   Sectors  Size Id Type /dev/sda1  *       2048   1050623   1048576  512M 83 Linux /dev/sda2       1050624 209715199 208664576 99.5G 8e Linux LVM     Disk /dev/mapper/ol-root: 91.5 GiB, 98243182592 bytes, 191881216 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     Disk /dev/mapper/ol-swap: 8 GiB, 8589934592 bytes, 16777216 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

아직까지 os가 200gb로 변경된것을 인지 못하고 있음

 

 

커널에 디스크 크기 변경 재인식 시킨 후 재확인(sda, sdb 확인 후 수행)

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# echo 1 > /sys/class/block/sda/device/rescan # fdisk -l Disk /dev/sda: 200 GiB, 214748364800 bytes, 419430400 sectors Disk model: Virtual disk Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x95bec2cc   Device     Boot   Start       End   Sectors  Size Id Type /dev/sda1  *       2048   1050623   1048576  512M 83 Linux /dev/sda2       1050624 209715199 208664576 99.5G 8e Linux LVM  <<---!!     Disk /dev/mapper/ol-root: 91.5 GiB, 98243182592 bytes, 191881216 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     Disk /dev/mapper/ol-swap: 8 GiB, 8589934592 bytes, 16777216 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

정상적으로 /dev/sda가 200gib가 됨

 

 

파티션 확장
(/dev/sda 디스크의 두번째 파티션인 /dev/sda2를 확장시키기 위해 아래와 같이 입력함)

1 2	# growpart /dev/sda 2 CHANGED: partition=2 start=1050624 old: size=208664576 end=209715199 new: size=418379743 end=419430366

변경됨
참고로 /dev/sda2 다음에 /dev/sda3가 존재하는 경우에는 /dev/sda2의 End 부분을 더 늘릴수 없기 때문에 증설이 불가함

 

 

fdisk 재확인

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# fdisk -l Disk /dev/sda: 200 GiB, 214748364800 bytes, 419430400 sectors Disk model: Virtual disk Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x95bec2cc   Device     Boot   Start       End   Sectors   Size Id Type /dev/sda1  *       2048   1050623   1048576   512M 83 Linux /dev/sda2       1050624 419430366 418379743 199.5G 8e Linux LVM  <<---!!     Disk /dev/mapper/ol-root: 91.5 GiB, 98243182592 bytes, 191881216 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     Disk /dev/mapper/ol-swap: 8 GiB, 8589934592 bytes, 16777216 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

이제 /dev/sda2가 200gb(199.5g)로 보임

 

 

LVM 물리 볼륨(PV) 확장

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# pvresize /dev/sda2   Physical volume "/dev/sda2" changed   1 physical volume(s) resized or updated / 0 physical volume(s) not resized

 

 

논리 볼륨(LV) 및 파일 시스템 확장
실제로 사용하는 /dev/mapper/ol-root 공간을 늘려줌
참고로 -r 옵션을 쓰면 파일 시스템 확장(xfs_growfs 등)까지 한 번에 처리됨

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# lvextend -r -l +100%FREE /dev/mapper/ol-root   File system xfs found on ol/root mounted at /.   Size of logical volume ol/root changed from <91.50 GiB (23423 extents) to <191.50 GiB (49023 extents).   Extending file system xfs to <191.50 GiB (205617364992 bytes) on ol/root... xfs_growfs /dev/ol/root meta-data=/dev/mapper/ol-root    isize=512    agcount=4, agsize=5996288 blks          =                       sectsz=512   attr=2, projid32bit=1          =                       crc=1        finobt=1, sparse=1, rmapbt=0          =                       reflink=1    bigtime=1 inobtcount=1 nrext64=0 data     =                       bsize=4096   blocks=23985152, imaxpct=25          =                       sunit=0      swidth=0 blks naming   =version 2              bsize=4096   ascii-ci=0, ftype=1 log      =internal log           bsize=4096   blocks=16384, version=2          =                       sectsz=512   sunit=0 blks, lazy-count=1 realtime =none                   extsz=4096   blocks=0, rtextents=0 data blocks changed from 23985152 to 50199552 xfs_growfs done   Extended file system xfs on ol/root.   Logical volume ol/root successfully resized.

 

 

df 명령어로 재확인

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# df -h Filesystem           Size  Used Avail Use% Mounted on devtmpfs             4.0M     0  4.0M   0% /dev tmpfs                 10G  1.1M   10G   1% /dev/shm tmpfs                2.4G  9.3M  2.4G   1% /run /dev/mapper/ol-root  192G   91G  101G  48% / /dev/sda1            448M  404M   44M  91% /boot tmpfs                1.2G   52K  1.2G   1% /run/user/42 tmpfs                1.2G   36K  1.2G   1% /run/user/0

정상적으로 92gb에서 192gb로 증설됨, 사용량은 48%로 내려감

 

 

결론 :
growpart 패키지를 이용해 vm 환경의 리눅스에서 디스크를 온라인으로 증설할 수 있음
물리 환경도 가능은 하다고 하지만 해보진 않음(multipathd resize map <맵이름> 명령 등)

 

 

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