Em primeiro lugar, nofail
permite que a sequência de inicialização continue, mesmo que a unidade não seja montada.
Isso é o que o fstab(5)
diz sobre nobootwait
The mountall(8) program that mounts filesystem during boot also recog‐ nises additional options that the ordinary mount(8) tool does not. These are:
bootwait
which can be applied to remote filesystems mounted outside of /usr or /var, without which mountall(8) would not hold up the boot for these;nobootwait
which can be applied to non-remote filesystems to explicitly instruct mountall(8) not to hold up the boot for them;optional
which causes the entry to be ignored if the filesystem type is not known at boot time; andshowthrough
which permits a mountpoint to be mounted before its parent mountpoint (this latter should be used carefully, as it can cause boot hangs).
fstab(5)
tem isto a dizer sobre nofail
nofail do not report errors for this device if it does not exist.