My Development setup has a RHEL Server 7.3 running inside VirtualBox 5.1.12 over a Windows Host.
I can use shared folder by mounting the directory explicitly from command line every time I log in with the command

mount -t vboxsf share ~/Windows

But Automating this procedure with a fstab entry , results in emergency mode at boot, wherein after logging in as root I remove the entry from fstab and boot proceeds as usual.

The fstab entry is like this ..

share /home/arun/Windows vboxsf rw,uid-1000,gid=1000 0 0

Another variation that I tried was this, with no change in the end result..

/media/sf_share /home/arun/Windows vboxsf rw,uid-1000,gid=1000 0 0

What could be causing this issue? Are there any logs that I can go through to find a fix for this problem ?