XFS (dm-0): unknown mount option [acl].

System goes into read-only mode after upgrading to CentOS 7.4.

"kernel: XFS (dm-0): unknown mount option [acl]"

Remove acl option for xfs filesystem.

/dev/mapper/centos-root / xfs defaults,acl 0 0

In XFS file-system acl is enabled by default. Therefore, it is not needed to mention it explicitly in /etc/fstab file. Prior to CentOS 7.4, acl option was being ignored by systemd daemon even if it was added in /etc/fstab for xfs file-system.

Alternative, what it not recommended but it works, change “ro” read-only to “rw” read-write in /etc/grub2.cfg file.

linux16 /vmlinuz-3.10.0-693.11.6.el7.x86_64 root=/dev/mapper/centos-root rw rd.lvm.lv=centos/root rd.lvm.lv=centos/swap crashkernel=auto rhgb quiet

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