12132017Headline:

RHEL 7 – Changed mount behavior at boot – Nofail

Earlier versions of Red Hat Enterprise Linux booted regardless of whether all partitions specified in /etc/fstab could be mounted. This could result in a system appearing “up” and healthy, while booting without required partitions.
To prevent this situation, in Red Hat Enterprise Linux 7, if a partition defined in /etc/fstab cannot be mounted at boot, boot fails. If a partition should not cause boot to fail in the event that it cannot be mounted, use the new nofail parameter in /etc/fstab.
/dev/critical     /critical   xfs   defaults          1  2
/dev/optional     /optional   xfs   defaults,nofail   1  2
In this example, the device mounted at /optional would not cause boot to fail if it could not be mounted successfully.

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