Hello, I have not found any information in the man page or otherwise that conflicts with the bellow, it just does not seem like the following should be possible:
# grep home /etc/fstab 424dc014a22db950.f /home ffs ro,nodev,nosuid,noatime # mount|grep home /dev/sd0f on /home type ffs (local, noatime, nodev, nosuid, read-only) # mount -uwo async /home # mount|grep home /dev/sd0f on /home type ffs (asynchronous, local, noatime, nodev, nosuid) # mount -uro sync /home # mount|grep /home /dev/sd0f on /home type ffs (asynchronous, local, noatime, nodev, nosuid, read-only, synchronous) I am however not familiar with the intricacies of filesystems, which probably makes me wrong. At least posting this will make my curiosity go away.