xfs_growfs: /dev/ol/root is not a mounted XFS filesystem

On Oracle Linux 7.7, trying to run “xfs_growfs’, and get errors.

[root@racnode1 ~]# xfs_growfs /dev/ol/root
xfs_growfs: /dev/ol/root is not a mounted XFS filesystem

It seems the syntax has been changed for this release. The mount point is required now instead of LV, like /dev/ol/root.

[root@racnode1 ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             4.8G     0  4.8G   0% /dev
tmpfs                2.0G  4.0K  2.0G   1% /dev/shm
tmpfs                4.8G  8.7M  4.8G   1% /run
tmpfs                4.8G     0  4.8G   0% /sys/fs/cgroup
/dev/mapper/ol-root   27G   17G   11G  62% /
/dev/sda1            497M  120M  377M  25% /boot
tmpfs                973M     0  973M   0% /run/user/0
tmpfs                973M     0  973M   0% /run/user/54321
[root@racnode1 ~]# xfs_info /
meta-data=/dev/mapper/ol-root    isize=256    agcount=4, agsize=1734656 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0 spinodes=0 rmapbt=0
         =                       reflink=0
data     =                       bsize=4096   blocks=6938624, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal               bsize=4096   blocks=3388, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
[root@racnode1 ~]#  xfs_growfs /
meta-data=/dev/mapper/ol-root    isize=256    agcount=4, agsize=1734656 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=0        finobt=0 spinodes=0 rmapbt=0
         =                       reflink=0
data     =                       bsize=4096   blocks=6938624, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=0
log      =internal               bsize=4096   blocks=3388, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 6938624 to 15974400

We can confirm root file system (/) size has been increased from 27GB to 61GB.

[root@racnode1 ~]# df -h
Filesystem           Size  Used Avail Use% Mounted on
devtmpfs             4.8G     0  4.8G   0% /dev
tmpfs                2.0G  4.0K  2.0G   1% /dev/shm
tmpfs                4.8G  8.7M  4.8G   1% /run
tmpfs                4.8G     0  4.8G   0% /sys/fs/cgroup
/dev/mapper/ol-root   61G   17G   45G  27% /
/dev/sda1            497M  120M  377M  25% /boot
tmpfs                973M     0  973M   0% /run/user/0
tmpfs                973M     0  973M   0% /run/user/54321

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